diff --git a/fastapi_app.py b/fastapi_app.py
index bf6551c..b1479dd 100644
--- a/fastapi_app.py
+++ b/fastapi_app.py
@@ -20,7 +20,7 @@ from pydantic import BaseModel, Field
 # Import utility modules
 from utils import (
     # Models
-    Message, DatasetRequest, ChatRequest, ChatResponse, QueueTaskRequest, QueueTaskResponse,
+    Message, DatasetRequest, ChatRequest, ChatResponse, QueueTaskRequest, IncrementalTaskRequest, QueueTaskResponse,
     QueueStatusResponse, TaskStatusResponse,
     
     # File utilities
@@ -47,7 +47,7 @@ from modified_assistant import update_agent_llm
 
 # Import queue manager
 from task_queue.manager import queue_manager
-from task_queue.integration_tasks import process_files_async, cleanup_project_async
+from task_queue.integration_tasks import process_files_async, process_files_incremental_async, cleanup_project_async
 from task_queue.task_status import task_status_store
 import re
 
@@ -264,6 +264,69 @@ async def process_files_async_endpoint(request: QueueTaskRequest, authorization:
         raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")
 
 
+@app.post("/api/v1/files/process/incremental")
+async def process_files_incremental_endpoint(request: IncrementalTaskRequest, authorization: Optional[str] = Header(None)):
+    """
+    增量处理文件的队列版本API - 支持添加和删除文件
+    
+    Args:
+        request: IncrementalTaskRequest containing dataset_id, files_to_add, files_to_remove, system_prompt, mcp_settings, and queue options
+        authorization: Authorization header containing API key (Bearer <API_KEY>)
+        
+    Returns:
+        QueueTaskResponse: Processing result with task ID for tracking
+    """
+    try:
+        dataset_id = request.dataset_id
+        if not dataset_id:
+            raise HTTPException(status_code=400, detail="dataset_id is required")
+        
+        # 验证至少有添加或删除操作
+        if not request.files_to_add and not request.files_to_remove:
+            raise HTTPException(status_code=400, detail="At least one of files_to_add or files_to_remove must be provided")
+        
+        # 估算处理时间（基于文件数量）
+        estimated_time = 0
+        total_add_files = sum(len(file_list) for file_list in (request.files_to_add or {}).values())
+        total_remove_files = sum(len(file_list) for file_list in (request.files_to_remove or {}).values())
+        total_files = total_add_files + total_remove_files
+        estimated_time = max(30, total_files * 10)  # 每个文件预估10秒，最少30秒
+        
+        # 创建任务状态记录
+        import uuid
+        task_id = str(uuid.uuid4())
+        task_status_store.set_status(
+            task_id=task_id,
+            unique_id=dataset_id,
+            status="pending"
+        )
+        
+        # 提交增量异步任务
+        task = process_files_incremental_async(
+            dataset_id=dataset_id,
+            files_to_add=request.files_to_add,
+            files_to_remove=request.files_to_remove,
+            system_prompt=request.system_prompt,
+            mcp_settings=request.mcp_settings,
+            task_id=task_id
+        )
+        
+        return QueueTaskResponse(
+            success=True,
+            message=f"增量文件处理任务已提交到队列 - 添加 {total_add_files} 个文件，删除 {total_remove_files} 个文件，项目ID: {dataset_id}",
+            unique_id=dataset_id,
+            task_id=task_id,
+            task_status="pending",
+            estimated_processing_time=estimated_time
+        )
+        
+    except HTTPException:
+        raise
+    except Exception as e:
+        print(f"Error submitting incremental file processing task: {str(e)}")
+        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")
+
+
 @app.get("/api/v1/task/{task_id}/status")
 async def get_task_status(task_id: str):
     """获取任务状态 - 简单可靠"""
diff --git a/task_queue/integration_tasks.py b/task_queue/integration_tasks.py
index 3104701..1bb59cc 100644
--- a/task_queue/integration_tasks.py
+++ b/task_queue/integration_tasks.py
@@ -11,7 +11,8 @@ from typing import Dict, List, Optional, Any
 from task_queue.config import huey
 from task_queue.manager import queue_manager
 from task_queue.task_status import task_status_store
-from utils import download_dataset_files, save_processed_files_log
+from utils import download_dataset_files, save_processed_files_log, load_processed_files_log
+from utils.dataset_manager import remove_dataset_directory_by_key
 
 
 @huey.task()
@@ -154,6 +155,196 @@ def process_files_async(
         }
 
 
+@huey.task()
+def process_files_incremental_async(
+    dataset_id: str,
+    files_to_add: Optional[Dict[str, List[str]]] = None,
+    files_to_remove: Optional[Dict[str, List[str]]] = None,
+    system_prompt: Optional[str] = None,
+    mcp_settings: Optional[List[Dict]] = None,
+    task_id: Optional[str] = None
+) -> Dict[str, Any]:
+    """
+    增量处理文件任务 - 支持添加和删除文件
+    
+    Args:
+        dataset_id: 项目唯一ID
+        files_to_add: 按key分组的要添加的文件路径字典
+        files_to_remove: 按key分组的要删除的文件路径字典
+        system_prompt: 系统提示词
+        mcp_settings: MCP设置
+        task_id: 任务ID（用于状态跟踪）
+        
+    Returns:
+        处理结果字典
+    """
+    try:
+        print(f"开始增量处理文件任务，项目ID: {dataset_id}")
+        
+        # 如果有task_id，设置初始状态
+        if task_id:
+            task_status_store.set_status(
+                task_id=task_id,
+                unique_id=dataset_id,
+                status="running"
+            )
+        
+        # 确保项目目录存在
+        project_dir = os.path.join("projects", "data", dataset_id)
+        if not os.path.exists(project_dir):
+            os.makedirs(project_dir, exist_ok=True)
+        
+        # 加载现有的处理日志
+        processed_log = load_processed_files_log(dataset_id)
+        print(f"加载现有处理日志，包含 {len(processed_log)} 个文件记录")
+        
+        removed_files = []
+        added_files = []
+        
+        # 1. 处理删除操作
+        if files_to_remove:
+            print(f"开始处理删除操作，涉及 {len(files_to_remove)} 个key分组")
+            for key, file_list in files_to_remove.items():
+                if not file_list:  # 如果文件列表为空，删除整个key分组
+                    print(f"删除整个key分组: {key}")
+                    if remove_dataset_directory_by_key(dataset_id, key):
+                        removed_files.append(f"dataset/{key}")
+                    
+                    # 从处理日志中移除该key的所有记录
+                    keys_to_remove = [file_hash for file_hash, file_info in processed_log.items() 
+                                    if file_info.get('key') == key]
+                    for file_hash in keys_to_remove:
+                        del processed_log[file_hash]
+                        removed_files.append(f"log_entry:{file_hash}")
+                else:
+                    # 删除特定文件
+                    for file_path in file_list:
+                        print(f"删除特定文件: {key}/{file_path}")
+                        # 计算文件hash以在日志中查找
+                        import hashlib
+                        file_hash = hashlib.md5(file_path.encode('utf-8')).hexdigest()
+                        
+                        # 从处理日志中移除
+                        if file_hash in processed_log:
+                            del processed_log[file_hash]
+                            removed_files.append(f"log_entry:{file_hash}")
+        
+        # 2. 处理添加操作
+        processed_files_by_key = {}
+        if files_to_add:
+            print(f"开始处理添加操作，涉及 {len(files_to_add)} 个key分组")
+            # 使用异步处理下载文件
+            import asyncio
+            try:
+                loop = asyncio.get_event_loop()
+            except RuntimeError:
+                loop = asyncio.new_event_loop()
+                asyncio.set_event_loop(loop)
+            
+            processed_files_by_key = loop.run_until_complete(download_dataset_files(dataset_id, files_to_add))
+            total_added_files = sum(len(files_list) for files_list in processed_files_by_key.values())
+            print(f"异步处理了 {total_added_files} 个数据集文件，涉及 {len(processed_files_by_key)} 个key，项目ID: {dataset_id}")
+            
+            # 记录添加的文件
+            for key, files_list in processed_files_by_key.items():
+                for file_path in files_list:
+                    added_files.append(f"{key}/{file_path}")
+        else:
+            print(f"请求中未提供要添加的文件，项目ID: {dataset_id}")
+        
+        # 保存更新后的处理日志
+        save_processed_files_log(dataset_id, processed_log)
+        print(f"已更新处理日志，当前包含 {len(processed_log)} 个文件记录")
+        
+        # 保存system_prompt和mcp_settings到项目目录（如果提供）
+        if system_prompt:
+            system_prompt_file = os.path.join(project_dir, "system_prompt.md")
+            with open(system_prompt_file, 'w', encoding='utf-8') as f:
+                f.write(system_prompt)
+            print(f"已保存system_prompt，项目ID: {dataset_id}")
+        
+        if mcp_settings:
+            mcp_settings_file = os.path.join(project_dir, "mcp_settings.json")
+            with open(mcp_settings_file, 'w', encoding='utf-8') as f:
+                json.dump(mcp_settings, f, ensure_ascii=False, indent=2)
+            print(f"已保存mcp_settings，项目ID: {dataset_id}")
+        
+        # 生成项目README.md文件
+        try:
+            from utils.project_manager import save_project_readme
+            save_project_readme(dataset_id)
+            print(f"已生成README.md文件，项目ID: {dataset_id}")
+        except Exception as e:
+            print(f"生成README.md失败，项目ID: {dataset_id}, 错误: {str(e)}")
+            # 不影响主要处理流程，继续执行
+        
+        # 收集项目目录下所有的 document.txt 文件
+        document_files = []
+        for root, dirs, files_list in os.walk(project_dir):
+            for file in files_list:
+                if file == "document.txt":
+                    document_files.append(os.path.join(root, file))
+        
+        # 构建结果文件列表
+        result_files = []
+        for key in processed_files_by_key.keys():
+            # 添加对应的dataset document.txt路径
+            document_path = os.path.join("projects", "data", dataset_id, "dataset", key, "document.txt")
+            if os.path.exists(document_path):
+                result_files.append(document_path)
+        
+        # 对于没有在processed_files_by_key中但存在的document.txt文件，也添加到结果中
+        existing_document_paths = set(result_files)  # 避免重复
+        for doc_file in document_files:
+            if doc_file not in existing_document_paths:
+                result_files.append(doc_file)
+        
+        result = {
+            "status": "success",
+            "message": f"增量处理完成 - 添加了 {len(added_files)} 个文件，删除了 {len(removed_files)} 个文件，最终保留 {len(result_files)} 个文档文件",
+            "dataset_id": dataset_id,
+            "removed_files": removed_files,
+            "added_files": added_files,
+            "processed_files": result_files,
+            "processed_files_by_key": processed_files_by_key,
+            "document_files": document_files,
+            "total_files_added": sum(len(files_list) for files_list in processed_files_by_key.values()),
+            "total_files_removed": len(removed_files),
+            "final_files_count": len(result_files),
+            "processing_time": time.time()
+        }
+        
+        # 更新任务状态为完成
+        if task_id:
+            task_status_store.update_status(
+                task_id=task_id,
+                status="completed",
+                result=result
+            )
+        
+        print(f"增量文件处理任务完成: {dataset_id}")
+        return result
+        
+    except Exception as e:
+        error_msg = f"增量处理文件时发生错误: {str(e)}"
+        print(error_msg)
+        
+        # 更新任务状态为错误
+        if task_id:
+            task_status_store.update_status(
+                task_id=task_id,
+                status="failed",
+                error=error_msg
+            )
+        
+        return {
+            "status": "error",
+            "message": error_msg,
+            "dataset_id": dataset_id,
+            "error": str(e)
+        }
+
+
 @huey.task()
 def cleanup_project_async(
     unique_id: str,
diff --git a/utils/__init__.py b/utils/__init__.py
index 51ea8ab..fd14a47 100644
--- a/utils/__init__.py
+++ b/utils/__init__.py
@@ -68,6 +68,7 @@ from .api_models import (
     ProjectStatsResponse,
     ProjectActionResponse,
     QueueTaskRequest,
+    IncrementalTaskRequest,
     QueueTaskResponse,
     QueueStatusResponse,
     TaskStatusResponse,
diff --git a/utils/api_models.py b/utils/api_models.py
index 12a8555..e15a9c9 100644
--- a/utils/api_models.py
+++ b/utils/api_models.py
@@ -245,6 +245,57 @@ class QueueTaskRequest(BaseModel):
             raise ValueError(f"Files must be a dict with key groups, got {type(v)}")
 
 
+class IncrementalTaskRequest(BaseModel):
+    """增量文件处理请求模型"""
+    dataset_id: str = Field(..., description="Dataset ID for the project")
+    files_to_add: Optional[Dict[str, List[str]]] = Field(default=None, description="Files to add organized by key groups")
+    files_to_remove: Optional[Dict[str, List[str]]] = Field(default=None, description="Files to remove organized by key groups")
+    system_prompt: Optional[str] = None
+    mcp_settings: Optional[List[Dict]] = None
+    priority: Optional[int] = Field(default=0, description="Task priority (higher number = higher priority)")
+    delay: Optional[int] = Field(default=0, description="Delay execution by N seconds")
+
+    model_config = ConfigDict(extra='allow')
+    
+    @field_validator('files_to_add', mode='before')
+    @classmethod
+    def validate_files_to_add(cls, v):
+        """Validate files_to_add dict format"""
+        if v is None:
+            return None
+        if isinstance(v, dict):
+            for key, value in v.items():
+                if not isinstance(key, str):
+                    raise ValueError(f"Key in files_to_add dict must be string, got {type(key)}")
+                if not isinstance(value, list):
+                    raise ValueError(f"Value in files_to_add dict must be list, got {type(value)} for key '{key}'")
+                for item in value:
+                    if not isinstance(item, str):
+                        raise ValueError(f"File paths must be strings, got {type(item)} in key '{key}'")
+            return v
+        else:
+            raise ValueError(f"files_to_add must be a dict with key groups, got {type(v)}")
+    
+    @field_validator('files_to_remove', mode='before')
+    @classmethod
+    def validate_files_to_remove(cls, v):
+        """Validate files_to_remove dict format"""
+        if v is None:
+            return None
+        if isinstance(v, dict):
+            for key, value in v.items():
+                if not isinstance(key, str):
+                    raise ValueError(f"Key in files_to_remove dict must be string, got {type(key)}")
+                if not isinstance(value, list):
+                    raise ValueError(f"Value in files_to_remove dict must be list, got {type(value)} for key '{key}'")
+                for item in value:
+                    if not isinstance(item, str):
+                        raise ValueError(f"File paths must be strings, got {type(item)} in key '{key}'")
+            return v
+        else:
+            raise ValueError(f"files_to_remove must be a dict with key groups, got {type(v)}")
+
+
 class QueueTaskResponse(BaseModel):
     """队列任务响应模型"""
     success: bool