diff --git a/server/document_parser.pb.go b/server/document_parser.pb.go
index 0510e9d..5a3d3f1 100644
--- a/server/document_parser.pb.go
+++ b/server/document_parser.pb.go
@@ -28,8 +28,10 @@ type ParseRequest struct {
 	FileType        string                 `protobuf:"bytes,3,opt,name=file_type,json=fileType,proto3" json:"file_type,omitempty"`
 	ParserEngine    string                 `protobuf:"bytes,4,opt,name=parser_engine,json=parserEngine,proto3" json:"parser_engine,omitempty"`
 	EngineOverrides map[string]string      `protobuf:"bytes,5,rep,name=engine_overrides,json=engineOverrides,proto3" json:"engine_overrides,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	unknownFields   protoimpl.UnknownFields
-	sizeCache       protoimpl.SizeCache
+	// VLM 配置（可选）
+	VlmConfig     *VLMConfig `protobuf:"bytes,6,opt,name=vlm_config,json=vlmConfig,proto3" json:"vlm_config,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
 }
 
 func (x *ParseRequest) Reset() {
@@ -97,6 +99,97 @@ func (x *ParseRequest) GetEngineOverrides() map[string]string {
 	return nil
 }
 
+func (x *ParseRequest) GetVlmConfig() *VLMConfig {
+	if x != nil {
+		return x.VlmConfig
+	}
+	return nil
+}
+
+type VLMConfig struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Enabled       bool                   `protobuf:"varint,1,opt,name=enabled,proto3" json:"enabled,omitempty"`               // 是否启用 VLM
+	Provider      string                 `protobuf:"bytes,2,opt,name=provider,proto3" json:"provider,omitempty"`              // VLM 提供商: openai, anthropic, local 等
+	Model         string                 `protobuf:"bytes,3,opt,name=model,proto3" json:"model,omitempty"`                    // 模型名称
+	ApiKey        string                 `protobuf:"bytes,4,opt,name=api_key,json=apiKey,proto3" json:"api_key,omitempty"`    // API Key
+	BaseUrl       string                 `protobuf:"bytes,5,opt,name=base_url,json=baseUrl,proto3" json:"base_url,omitempty"` // 自定义 API 地址
+	Prompt        string                 `protobuf:"bytes,6,opt,name=prompt,proto3" json:"prompt,omitempty"`                  // 自定义提示词
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *VLMConfig) Reset() {
+	*x = VLMConfig{}
+	mi := &file_document_parser_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *VLMConfig) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VLMConfig) ProtoMessage() {}
+
+func (x *VLMConfig) ProtoReflect() protoreflect.Message {
+	mi := &file_document_parser_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VLMConfig.ProtoReflect.Descriptor instead.
+func (*VLMConfig) Descriptor() ([]byte, []int) {
+	return file_document_parser_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *VLMConfig) GetEnabled() bool {
+	if x != nil {
+		return x.Enabled
+	}
+	return false
+}
+
+func (x *VLMConfig) GetProvider() string {
+	if x != nil {
+		return x.Provider
+	}
+	return ""
+}
+
+func (x *VLMConfig) GetModel() string {
+	if x != nil {
+		return x.Model
+	}
+	return ""
+}
+
+func (x *VLMConfig) GetApiKey() string {
+	if x != nil {
+		return x.ApiKey
+	}
+	return ""
+}
+
+func (x *VLMConfig) GetBaseUrl() string {
+	if x != nil {
+		return x.BaseUrl
+	}
+	return ""
+}
+
+func (x *VLMConfig) GetPrompt() string {
+	if x != nil {
+		return x.Prompt
+	}
+	return ""
+}
+
 type ParseResponse struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Success       bool                   `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
@@ -111,7 +204,7 @@ type ParseResponse struct {
 
 func (x *ParseResponse) Reset() {
 	*x = ParseResponse{}
-	mi := &file_document_parser_proto_msgTypes[1]
+	mi := &file_document_parser_proto_msgTypes[2]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -123,7 +216,7 @@ func (x *ParseResponse) String() string {
 func (*ParseResponse) ProtoMessage() {}
 
 func (x *ParseResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_document_parser_proto_msgTypes[1]
+	mi := &file_document_parser_proto_msgTypes[2]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -136,7 +229,7 @@ func (x *ParseResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ParseResponse.ProtoReflect.Descriptor instead.
 func (*ParseResponse) Descriptor() ([]byte, []int) {
-	return file_document_parser_proto_rawDescGZIP(), []int{1}
+	return file_document_parser_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *ParseResponse) GetSuccess() bool {
@@ -189,7 +282,7 @@ type Empty struct {
 
 func (x *Empty) Reset() {
 	*x = Empty{}
-	mi := &file_document_parser_proto_msgTypes[2]
+	mi := &file_document_parser_proto_msgTypes[3]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -201,7 +294,7 @@ func (x *Empty) String() string {
 func (*Empty) ProtoMessage() {}
 
 func (x *Empty) ProtoReflect() protoreflect.Message {
-	mi := &file_document_parser_proto_msgTypes[2]
+	mi := &file_document_parser_proto_msgTypes[3]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -214,7 +307,7 @@ func (x *Empty) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Empty.ProtoReflect.Descriptor instead.
 func (*Empty) Descriptor() ([]byte, []int) {
-	return file_document_parser_proto_rawDescGZIP(), []int{2}
+	return file_document_parser_proto_rawDescGZIP(), []int{3}
 }
 
 type SupportedFormatsResponse struct {
@@ -227,7 +320,7 @@ type SupportedFormatsResponse struct {
 
 func (x *SupportedFormatsResponse) Reset() {
 	*x = SupportedFormatsResponse{}
-	mi := &file_document_parser_proto_msgTypes[3]
+	mi := &file_document_parser_proto_msgTypes[4]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -239,7 +332,7 @@ func (x *SupportedFormatsResponse) String() string {
 func (*SupportedFormatsResponse) ProtoMessage() {}
 
 func (x *SupportedFormatsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_document_parser_proto_msgTypes[3]
+	mi := &file_document_parser_proto_msgTypes[4]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -252,7 +345,7 @@ func (x *SupportedFormatsResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SupportedFormatsResponse.ProtoReflect.Descriptor instead.
 func (*SupportedFormatsResponse) Descriptor() ([]byte, []int) {
-	return file_document_parser_proto_rawDescGZIP(), []int{3}
+	return file_document_parser_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *SupportedFormatsResponse) GetFileTypes() []string {
@@ -278,7 +371,7 @@ type EnginesResponse struct {
 
 func (x *EnginesResponse) Reset() {
 	*x = EnginesResponse{}
-	mi := &file_document_parser_proto_msgTypes[4]
+	mi := &file_document_parser_proto_msgTypes[5]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -290,7 +383,7 @@ func (x *EnginesResponse) String() string {
 func (*EnginesResponse) ProtoMessage() {}
 
 func (x *EnginesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_document_parser_proto_msgTypes[4]
+	mi := &file_document_parser_proto_msgTypes[5]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -303,7 +396,7 @@ func (x *EnginesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use EnginesResponse.ProtoReflect.Descriptor instead.
 func (*EnginesResponse) Descriptor() ([]byte, []int) {
-	return file_document_parser_proto_rawDescGZIP(), []int{4}
+	return file_document_parser_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *EnginesResponse) GetEngines() []*EngineInfo {
@@ -326,7 +419,7 @@ type EngineInfo struct {
 
 func (x *EngineInfo) Reset() {
 	*x = EngineInfo{}
-	mi := &file_document_parser_proto_msgTypes[5]
+	mi := &file_document_parser_proto_msgTypes[6]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -338,7 +431,7 @@ func (x *EngineInfo) String() string {
 func (*EngineInfo) ProtoMessage() {}
 
 func (x *EngineInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_document_parser_proto_msgTypes[5]
+	mi := &file_document_parser_proto_msgTypes[6]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -351,7 +444,7 @@ func (x *EngineInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use EngineInfo.ProtoReflect.Descriptor instead.
 func (*EngineInfo) Descriptor() ([]byte, []int) {
-	return file_document_parser_proto_rawDescGZIP(), []int{5}
+	return file_document_parser_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *EngineInfo) GetName() string {
@@ -393,16 +486,25 @@ var File_document_parser_proto protoreflect.FileDescriptor
 
 const file_document_parser_proto_rawDesc = "" +
 	"\n" +
-	"\x15document_parser.proto\x12\tdocparser\"\xa5\x02\n" +
+	"\x15document_parser.proto\x12\tdocparser\"\xda\x02\n" +
 	"\fParseRequest\x12\x19\n" +
 	"\bfile_url\x18\x01 \x01(\tR\afileUrl\x12\x1b\n" +
 	"\tfile_name\x18\x02 \x01(\tR\bfileName\x12\x1b\n" +
 	"\tfile_type\x18\x03 \x01(\tR\bfileType\x12#\n" +
 	"\rparser_engine\x18\x04 \x01(\tR\fparserEngine\x12W\n" +
-	"\x10engine_overrides\x18\x05 \x03(\v2,.docparser.ParseRequest.EngineOverridesEntryR\x0fengineOverrides\x1aB\n" +
+	"\x10engine_overrides\x18\x05 \x03(\v2,.docparser.ParseRequest.EngineOverridesEntryR\x0fengineOverrides\x123\n" +
+	"\n" +
+	"vlm_config\x18\x06 \x01(\v2\x14.docparser.VLMConfigR\tvlmConfig\x1aB\n" +
 	"\x14EngineOverridesEntry\x12\x10\n" +
 	"\x03key\x18\x01 \x01(\tR\x03key\x12\x14\n" +
-	"\x05value\x18\x02 \x01(\tR\x05value:\x028\x01\"\xc6\x01\n" +
+	"\x05value\x18\x02 \x01(\tR\x05value:\x028\x01\"\xa3\x01\n" +
+	"\tVLMConfig\x12\x18\n" +
+	"\aenabled\x18\x01 \x01(\bR\aenabled\x12\x1a\n" +
+	"\bprovider\x18\x02 \x01(\tR\bprovider\x12\x14\n" +
+	"\x05model\x18\x03 \x01(\tR\x05model\x12\x17\n" +
+	"\aapi_key\x18\x04 \x01(\tR\x06apiKey\x12\x19\n" +
+	"\bbase_url\x18\x05 \x01(\tR\abaseUrl\x12\x16\n" +
+	"\x06prompt\x18\x06 \x01(\tR\x06prompt\"\xc6\x01\n" +
 	"\rParseResponse\x12\x18\n" +
 	"\asuccess\x18\x01 \x01(\bR\asuccess\x12\x18\n" +
 	"\acontent\x18\x02 \x01(\tR\acontent\x12\x18\n" +
@@ -445,32 +547,34 @@ func file_document_parser_proto_rawDescGZIP() []byte {
 	return file_document_parser_proto_rawDescData
 }
 
-var file_document_parser_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
+var file_document_parser_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
 var file_document_parser_proto_goTypes = []any{
 	(*ParseRequest)(nil),             // 0: docparser.ParseRequest
-	(*ParseResponse)(nil),            // 1: docparser.ParseResponse
-	(*Empty)(nil),                    // 2: docparser.Empty
-	(*SupportedFormatsResponse)(nil), // 3: docparser.SupportedFormatsResponse
-	(*EnginesResponse)(nil),          // 4: docparser.EnginesResponse
-	(*EngineInfo)(nil),               // 5: docparser.EngineInfo
-	nil,                              // 6: docparser.ParseRequest.EngineOverridesEntry
-	nil,                              // 7: docparser.SupportedFormatsResponse.FileTypeDescriptionsEntry
+	(*VLMConfig)(nil),                // 1: docparser.VLMConfig
+	(*ParseResponse)(nil),            // 2: docparser.ParseResponse
+	(*Empty)(nil),                    // 3: docparser.Empty
+	(*SupportedFormatsResponse)(nil), // 4: docparser.SupportedFormatsResponse
+	(*EnginesResponse)(nil),          // 5: docparser.EnginesResponse
+	(*EngineInfo)(nil),               // 6: docparser.EngineInfo
+	nil,                              // 7: docparser.ParseRequest.EngineOverridesEntry
+	nil,                              // 8: docparser.SupportedFormatsResponse.FileTypeDescriptionsEntry
 }
 var file_document_parser_proto_depIdxs = []int32{
-	6, // 0: docparser.ParseRequest.engine_overrides:type_name -> docparser.ParseRequest.EngineOverridesEntry
-	7, // 1: docparser.SupportedFormatsResponse.file_type_descriptions:type_name -> docparser.SupportedFormatsResponse.FileTypeDescriptionsEntry
-	5, // 2: docparser.EnginesResponse.engines:type_name -> docparser.EngineInfo
-	0, // 3: docparser.DocumentParser.ParseDocument:input_type -> docparser.ParseRequest
-	2, // 4: docparser.DocumentParser.GetSupportedFormats:input_type -> docparser.Empty
-	2, // 5: docparser.DocumentParser.GetEngines:input_type -> docparser.Empty
-	1, // 6: docparser.DocumentParser.ParseDocument:output_type -> docparser.ParseResponse
-	3, // 7: docparser.DocumentParser.GetSupportedFormats:output_type -> docparser.SupportedFormatsResponse
-	4, // 8: docparser.DocumentParser.GetEngines:output_type -> docparser.EnginesResponse
-	6, // [6:9] is the sub-list for method output_type
-	3, // [3:6] is the sub-list for method input_type
-	3, // [3:3] is the sub-list for extension type_name
-	3, // [3:3] is the sub-list for extension extendee
-	0, // [0:3] is the sub-list for field type_name
+	7, // 0: docparser.ParseRequest.engine_overrides:type_name -> docparser.ParseRequest.EngineOverridesEntry
+	1, // 1: docparser.ParseRequest.vlm_config:type_name -> docparser.VLMConfig
+	8, // 2: docparser.SupportedFormatsResponse.file_type_descriptions:type_name -> docparser.SupportedFormatsResponse.FileTypeDescriptionsEntry
+	6, // 3: docparser.EnginesResponse.engines:type_name -> docparser.EngineInfo
+	0, // 4: docparser.DocumentParser.ParseDocument:input_type -> docparser.ParseRequest
+	3, // 5: docparser.DocumentParser.GetSupportedFormats:input_type -> docparser.Empty
+	3, // 6: docparser.DocumentParser.GetEngines:input_type -> docparser.Empty
+	2, // 7: docparser.DocumentParser.ParseDocument:output_type -> docparser.ParseResponse
+	4, // 8: docparser.DocumentParser.GetSupportedFormats:output_type -> docparser.SupportedFormatsResponse
+	5, // 9: docparser.DocumentParser.GetEngines:output_type -> docparser.EnginesResponse
+	7, // [7:10] is the sub-list for method output_type
+	4, // [4:7] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
 }
 
 func init() { file_document_parser_proto_init() }
@@ -484,7 +588,7 @@ func file_document_parser_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_document_parser_proto_rawDesc), len(file_document_parser_proto_rawDesc)),
 			NumEnums:      0,
-			NumMessages:   8,
+			NumMessages:   9,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/server/internal/model/knowledge_info.go b/server/internal/model/knowledge_info.go
index be4c3a4..87c333a 100644
--- a/server/internal/model/knowledge_info.go
+++ b/server/internal/model/knowledge_info.go
@@ -10,9 +10,17 @@ import (
 // ParsingConfig 解析配置
 type ParsingConfig struct {
 	Engine     string `json:"engine"`      // markitdown / docling
-	DoclingURL string `json:"docling_url"`  // Docling 服务 URL
-	EnablePDF  bool   `json:"enable_pdf"`   // 是否启用 PDF 解析
+	DoclingURL string `json:"docling_url"` // Docling 服务 URL
+	EnablePDF  bool   `json:"enable_pdf"`  // 是否启用 PDF 解析
 	Pandoc     bool   `json:"pandoc"`      // 是否启用 Pandoc
+
+	// VLM 配置（用于图片 OCR 等）
+	VLMEnabled  bool   `json:"vlm_enabled"`   // 是否启用 VLM
+	VLMProvider string `json:"vlm_provider"`  // VLM 提供商: openai, anthropic, local 等
+	VLMModel    string `json:"vlm_model"`    // 模型名称
+	VLMAPIKey   string `json:"vlm_api_key"`  // API Key
+	VLMBaseURL  string `json:"vlm_base_url"` // 自定义 API 地址
+	VLMPrompt   string `json:"vlm_prompt"`   // 自定义提示词
 }
 
 // Scan 实现 sql.Scanner 接口
diff --git a/server/internal/service/document_parser_client.go b/server/internal/service/document_parser_client.go
index 22ff48b..42e4181 100644
--- a/server/internal/service/document_parser_client.go
+++ b/server/internal/service/document_parser_client.go
@@ -27,6 +27,16 @@ type ParseResult struct {
 	ParserEngine  string
 }
 
+// VLMConfig VLM 模型配置
+type VLMConfig struct {
+	Enabled  bool
+	Provider string // openai, anthropic, local 等
+	Model    string
+	APIKey   string
+	BaseURL  string
+	Prompt   string
+}
+
 // NewAICoreClient 创建 AI-Core 客户端
 func NewAICoreClient(address string) (*AICoreClient, error) {
 	return &AICoreClient{address: address}, nil
@@ -56,7 +66,8 @@ func (c *AICoreClient) Close() {
 }
 
 // ParseDocument 解析文档 - 使用生成的 protobuf 代码
-func (c *AICoreClient) ParseDocument(fileURL, fileName, fileType string) (*ParseResult, error) {
+// vlmConfig 可选，如果不使用 VLM 传 nil
+func (c *AICoreClient) ParseDocument(fileURL, fileName, fileType string, vlmConfig *VLMConfig) (*ParseResult, error) {
 	if c.conn == nil {
 		if err := c.Connect(); err != nil {
 			return nil, err
@@ -72,6 +83,18 @@ func (c *AICoreClient) ParseDocument(fileURL, fileName, fileType string) (*Parse
 		FileType: fileType,
 	}
 
+	// 如果提供了 VLM 配置，添加到请求中
+	if vlmConfig != nil {
+		req.VlmConfig = &docparser.VLMConfig{
+			Enabled:  vlmConfig.Enabled,
+			Provider: vlmConfig.Provider,
+			Model:    vlmConfig.Model,
+			ApiKey:   vlmConfig.APIKey,
+			BaseUrl:  vlmConfig.BaseURL,
+			Prompt:   vlmConfig.Prompt,
+		}
+	}
+
 	ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
 	defer cancel()
 
diff --git a/server/internal/service/knowledge_service.go b/server/internal/service/knowledge_service.go
index 763a878..c067fa3 100644
--- a/server/internal/service/knowledge_service.go
+++ b/server/internal/service/knowledge_service.go
@@ -3,6 +3,7 @@ package service
 import (
 	"bytes"
 	"encoding/json"
+	"io"
 	"log"
 	"mime/multipart"
 	"net/http"
@@ -19,8 +20,15 @@ import (
 var knowledgeDebugLog *log.Logger
 
 func init() {
-	debugFile, _ := os.OpenFile("logs/debug.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
-	knowledgeDebugLog = log.New(debugFile, "", log.Ldate|log.Ltime)
+	// 确保 logs 目录存在
+	os.MkdirAll("logs", 0755)
+	debugFile, err := os.OpenFile("logs/debug.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	if err != nil {
+		// 如果文件打开失败，使用 discard 避免输出到控制台
+		knowledgeDebugLog = log.New(io.Discard, "", log.Ldate|log.Ltime)
+	} else {
+		knowledgeDebugLog = log.New(debugFile, "", log.Ldate|log.Ltime)
+	}
 }
 
 type KnowledgeService struct {
@@ -133,10 +141,36 @@ func (s *KnowledgeService) Update(id string, req model.UpdateKnowledgeRequest) e
 
 // Delete 删除知识库
 func (s *KnowledgeService) Delete(id string) error {
-	// 先删除关联的文档
+	// 获取知识库信息
+	kb, err := s.repo.FindByID(id)
+	if err != nil {
+		return err
+	}
+
+	// 获取知识库下所有文档
+	docs, err := s.repo.FindDocumentsByKBID(id, "")
+	if err != nil {
+		return err
+	}
+
+	// 删除每个文档的 MinIO 文件和本地 Markdown 文件
+	for _, doc := range docs {
+		// 删除 MinIO 文件
+		if doc.FileKey != "" && kb.StorageConfig.Type == "minio" {
+			s.uploadService.DeleteFileWithConfig(doc.FileKey, kb.StorageConfig)
+		}
+		// 删除本地 Markdown 文件
+		if s.markdownLocalPath != "" {
+			markdownPath := s.markdownLocalPath + "/" + doc.ID + ".md"
+			os.Remove(markdownPath)
+		}
+	}
+
+	// 删除关联的文档（数据库记录）
 	if err := s.repo.DeleteDocumentsByKBID(id); err != nil {
 		return err
 	}
+
 	return s.repo.Delete(id)
 }
 
@@ -233,7 +267,7 @@ func (s *KnowledgeService) UploadDocument(kbID string, file *multipart.FileHeade
 	go s.parseDocument(kbID, doc.ID, result.URL, kb.ParsingConfig)
 
 	// 异步调用 AI-Core gRPC 服务解析文档（获取 Markdown）
-	go s.parseDocumentWithAICore(doc.ID, result.URL, doc.Name)
+	go s.parseDocumentWithAICore(doc.ID, result.URL, doc.Name, kb.ParsingConfig)
 
 	return doc, result.URL, nil
 }
@@ -293,7 +327,7 @@ func (s *KnowledgeService) parseDocument(kbID, docID, fileURL string, config mod
 }
 
 // parseDocumentWithAICore 调用 AI-Core gRPC 服务解析文档
-func (s *KnowledgeService) parseDocumentWithAICore(docID, fileURL, fileName string) {
+func (s *KnowledgeService) parseDocumentWithAICore(docID, fileURL, fileName string, config model.ParsingConfig) {
 	if s.aiCoreClient == nil {
 		knowledgeDebugLog.Printf("[AICore] AI-Core 客户端未初始化")
 		return
@@ -301,7 +335,21 @@ func (s *KnowledgeService) parseDocumentWithAICore(docID, fileURL, fileName stri
 
 	knowledgeDebugLog.Printf("[AICore] 开始解析文档: docID=%s, fileURL=%s, fileName=%s", docID, fileURL, fileName)
 
-	result, err := s.aiCoreClient.ParseDocument(fileURL, fileName, "")
+	// 构建 VLM 配置
+	var vlmConfig *VLMConfig
+	if config.VLMEnabled {
+		vlmConfig = &VLMConfig{
+			Enabled:  config.VLMEnabled,
+			Provider: config.VLMProvider,
+			Model:    config.VLMModel,
+			APIKey:   config.VLMAPIKey,
+			BaseURL:  config.VLMBaseURL,
+			Prompt:   config.VLMPrompt,
+		}
+		knowledgeDebugLog.Printf("[AICore] VLM 配置: provider=%s, model=%s, enabled=%v", config.VLMProvider, config.VLMModel, config.VLMEnabled)
+	}
+
+	result, err := s.aiCoreClient.ParseDocument(fileURL, fileName, "", vlmConfig)
 	if err != nil {
 		knowledgeDebugLog.Printf("[AICore] 解析失败: docID=%s, err=%v", docID, err)
 		return
@@ -462,7 +510,7 @@ func (s *KnowledgeService) GetDocumentPreview(kbID, docID string, page int) (*mo
 	// Office文件调用解析服务转换为HTML
 	if isOffice && s.aiCoreClient != nil {
 		knowledgeDebugLog.Printf("[Preview] Parsing office file: %s, URL: %s", fileName, fileURL)
-		result, err := s.aiCoreClient.ParseDocument(fileURL, fileName, "")
+		result, err := s.aiCoreClient.ParseDocument(fileURL, fileName, "", nil) // Preview 不使用 VLM
 		if err != nil {
 			// 解析失败，返回文件URL
 			knowledgeDebugLog.Printf("[Preview] Parse document failed: %v", err)