diff --git a/app.py b/app.py
index d86bac5..fd83848 100644
--- a/app.py
+++ b/app.py
@@ -828,6 +828,7 @@ async def debug_grow_timing(
     image_base64: Optional[str] = Form(default=None),
     hair_style: str = Form(default="2", description="发型序号(花瓣=2)，逗号分隔多选"),
     webui_steps: Optional[int] = Form(default=None, description="swapHair webui img2img 采样步数，None=服务端默认(15)，可填10/15/20/25对比"),
+    redraw_max_side: Optional[int] = Form(default=None, description="ComfyUI重绘分辨率(长边像素)。None=默认896；0=原图不缩；其他如640/768/1024"),
 ):
     """单图跑接口2女性生发，返回每个步骤的耗时 + 结果图，用于定位性能瓶颈。
 
@@ -870,7 +871,7 @@ async def debug_grow_timing(
 
         hair_mask_reuse = (ctx["parse_map"] == SEGFORMER_HAIR)
         h, w = image.shape[:2]
-        eff_side = _REDRAW_MAX_SIDE
+        eff_side = _REDRAW_MAX_SIDE if redraw_max_side is None else redraw_max_side
         redraw_img, hair_mask_redraw = image, hair_mask_reuse
         downscale_info = None
         if eff_side > 0 and max(h, w) > eff_side:
diff --git a/static/debug_grow_timing.html b/static/debug_grow_timing.html
index 43d643f..3ec7b9f 100644
--- a/static/debug_grow_timing.html
+++ b/static/debug_grow_timing.html
@@ -91,6 +91,17 @@
           <option value="30">30</option>
         </select>
       </div>
+      <div class="form-group">
+        <label>重绘分辨率</label>
+        <select id="redrawMaxSide">
+          <option value="">默认(896)</option>
+          <option value="640">640 (最快)</option>
+          <option value="768">768</option>
+          <option value="896">896</option>
+          <option value="1024">1024 (高画质)</option>
+          <option value="0">原图(不缩)</option>
+        </select>
+      </div>
       <button class="btn btn-primary" id="submitBtn" onclick="submitTest()">🚀 开始分析</button>
     </div>
     <div id="statusBar" class="status hidden"></div>
@@ -128,6 +139,8 @@ async function submitTest(){
   fd.append('hair_style', $('hairStyle').value);
   const _steps = $('webuiSteps').value;
   if(_steps !== '') fd.append('webui_steps', _steps);
+  const _side = $('redrawMaxSide').value;
+  if(_side !== '') fd.append('redraw_max_side', _side);
 
   try{
     const r = await fetch(API_BASE+'/api/v1/debug/grow-timing',{