diff --git a/mineru/cli/fast_api.py b/mineru/cli/fast_api.py
index d393c75..23e95f3 100644
--- a/mineru/cli/fast_api.py
+++ b/mineru/cli/fast_api.py
@@ -5,6 +5,8 @@ import re
 import tempfile
 import asyncio
 import threading
+import hashlib
+import json
 import uvicorn
 import click
 import zipfile
@@ -36,13 +38,54 @@ _request_semaphore: Optional[asyncio.Semaphore] = None
 
 # --- 任务进度跟踪 ---
 _task_progress: dict = {}
+_task_progress_dir = Path(
+    os.getenv("MINERU_TASK_PROGRESS_DIR", Path(tempfile.gettempdir()) / "mineru-task-progress")
+)
+
+
+def _task_progress_path(task_id: str) -> Path:
+    task_key = hashlib.sha256(task_id.encode("utf-8")).hexdigest()
+    return _task_progress_dir / f"{task_key}.json"
+
+
+def _store_task_progress(task_id: str, state: dict) -> None:
+    """Store progress in memory and on disk so API worker processes share it."""
+    state = dict(state)
+    state["task_id"] = task_id
+    _task_progress[task_id] = state
+
+    try:
+        _task_progress_dir.mkdir(parents=True, exist_ok=True)
+        progress_path = _task_progress_path(task_id)
+        temp_path = progress_path.with_name(
+            f"{progress_path.name}.{os.getpid()}.{threading.get_ident()}.tmp"
+        )
+        with open(temp_path, "w", encoding="utf-8") as fp:
+            json.dump(state, fp, ensure_ascii=False)
+        os.replace(temp_path, progress_path)
+    except Exception as exc:
+        logger.warning(f"Failed to persist task progress for {task_id}: {exc}")
+
+
+def _get_task_progress(task_id: str) -> Optional[dict]:
+    try:
+        with open(_task_progress_path(task_id), "r", encoding="utf-8") as fp:
+            state = json.load(fp)
+        _task_progress[task_id] = state
+        return state
+    except (FileNotFoundError, json.JSONDecodeError, OSError):
+        return _task_progress.get(task_id)
 
 
 def _update_task_progress(task_id: Optional[str], progress: int, stage: str):
     """更新任务进度（安全调用，task_id 为 None 时静默跳过）"""
-    if task_id and task_id in _task_progress:
-        _task_progress[task_id]["progress"] = min(progress, 100)
-        _task_progress[task_id]["stage"] = stage
+    if not task_id:
+        return
+    state = _get_task_progress(task_id)
+    if state is not None:
+        state["progress"] = min(progress, 100)
+        state["stage"] = stage
+        _store_task_progress(task_id, state)
 
 
 class ProgressTracker:
@@ -248,12 +291,29 @@ def get_infer_result(file_suffix_identifier: str, pdf_name: str, parse_dir: str)
 api_router = APIRouter(prefix="/api")
 
 
+@api_router.post("/parse_tasks/{task_id}", status_code=201)
+async def create_parse_task(task_id: str):
+    """Register a task before the multipart upload starts."""
+    state = {
+        "progress": 0,
+        "stage": "等待上传",
+        "status": "pending",
+        "error": None,
+        "file_names": "",
+    }
+    _store_task_progress(task_id, state)
+    logger.info(f"Registered parse task pid={os.getpid()} task_id={task_id}")
+    return state
+
+
 @api_router.get("/parse_progress/{task_id}")
 async def get_parse_progress(task_id: str):
     """查询解析任务的实时进度"""
-    if task_id not in _task_progress:
+    state = _get_task_progress(task_id)
+    if state is None:
+        logger.warning(f"Parse task not found pid={os.getpid()} task_id={task_id}")
         raise HTTPException(status_code=404, detail="Task not found")
-    return _task_progress[task_id]
+    return state
 
 
 @api_router.post(path="/file_parse", dependencies=[Depends(limit_concurrency)])
@@ -274,6 +334,7 @@ async def parse_pdf(
         response_format_zip: bool = Form(False),
         start_page_id: int = Form(0),
         end_page_id: int = Form(99999),
+        form_task_id: Optional[str] = Form(None, alias="task_id"),
         x_task_id: Optional[str] = Header(None),
 ):
     # 从 app 实例状态中获取配置 (FastAPI 实例会在下方创建)
@@ -281,12 +342,16 @@ async def parse_pdf(
     config = getattr(app.state, "config", {})
 
     # 初始化进度跟踪
-    task_id = x_task_id or str(uuid.uuid4())
+    task_id = x_task_id or form_task_id or str(uuid.uuid4())
     file_names_str = ", ".join(f.filename or "unknown" for f in files)
-    _task_progress[task_id] = {
+    _store_task_progress(task_id, {
         "progress": 0, "stage": "准备中", "status": "processing",
         "error": None, "file_names": file_names_str,
-    }
+    })
+    logger.info(
+        f"Started parse task pid={os.getpid()} task_id={task_id} "
+        f"header_task_id={x_task_id} form_task_id={form_task_id}"
+    )
 
     try:
         unique_dir = os.path.join(output_dir, str(uuid.uuid4()))
@@ -353,7 +418,9 @@ async def parse_pdf(
         _update_task_progress(task_id, 97, "生成结果文件")
 
         _update_task_progress(task_id, 100, "转换完成")
-        _task_progress[task_id]["status"] = "completed"
+        completed_state = _get_task_progress(task_id) or {}
+        completed_state["status"] = "completed"
+        _store_task_progress(task_id, completed_state)
 
         # 清理日志捕获和 stderr 捕获
         stderr_capture.stop()
@@ -416,8 +483,10 @@ async def parse_pdf(
             _current_task_id = None
         except Exception:
             pass
-        _task_progress[task_id]["status"] = "failed"
-        _task_progress[task_id]["error"] = str(e)
+        failed_state = _get_task_progress(task_id) or {}
+        failed_state["status"] = "failed"
+        failed_state["error"] = str(e)
+        _store_task_progress(task_id, failed_state)
         return JSONResponse(status_code=500, content={"error": f"Internal Error: {str(e)}"})
 
 
@@ -481,4 +550,4 @@ def main(ctx, host, port, reload, **kwargs):
 
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()
diff --git a/web_ui/src/api/document.ts b/web_ui/src/api/document.ts
index a1addbc..170a99f 100644
--- a/web_ui/src/api/document.ts
+++ b/web_ui/src/api/document.ts
@@ -32,7 +32,7 @@ export interface ParseResult {
 export interface ParseProgress {
   progress: number
   stage: string
-  status: 'processing' | 'completed' | 'failed'
+  status: 'pending' | 'processing' | 'completed' | 'failed'
   error: string | null
   file_names: string
 }
@@ -65,6 +65,9 @@ export const documentApi = {
     if (params.server_url) {
       formData.append('server_url', params.server_url)
     }
+    if (taskId) {
+      formData.append('task_id', taskId)
+    }
     
     return request.post('/api/file_parse', formData, {
         headers: {
@@ -80,6 +83,12 @@ export const documentApi = {
     })
   },
 
+  createParseTask(taskId: string): Promise<ParseProgress> {
+    return request.post(`/api/parse_tasks/${encodeURIComponent(taskId)}`).then(result => {
+      return result as unknown as ParseProgress
+    })
+  },
+
   /**
    * 查询解析进度
    */
@@ -88,4 +97,4 @@ export const documentApi = {
       return result as unknown as ParseProgress
     })
   }
-}
\ No newline at end of file
+}
diff --git a/web_ui/src/composables/useDocumentProcessor.ts b/web_ui/src/composables/useDocumentProcessor.ts
index c29f22c..ec22cc3 100644
--- a/web_ui/src/composables/useDocumentProcessor.ts
+++ b/web_ui/src/composables/useDocumentProcessor.ts
@@ -200,9 +200,10 @@ export function useDocumentProcessor() {
     
     // 生成任务ID
     const taskId = `task-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`
-    startProgressPolling(taskId)
     
     try {
+      await documentApi.createParseTask(taskId)
+      startProgressPolling(taskId)
       processingStage.value = '提交文档到解析服务'
       const params: ParseParams = {
         files: uploadedFiles.value,
diff --git a/web_ui/vite.config.ts b/web_ui/vite.config.ts
index 70d39ee..d697784 100644
--- a/web_ui/vite.config.ts
+++ b/web_ui/vite.config.ts
@@ -13,7 +13,7 @@ export default defineConfig({
     port: 3000,
     proxy: {
       '/api': {
-        target: 'http://localhost:8000',
+        target: 'http://10.100.52.76:8000',
         changeOrigin: true
       }
     }