diff --git a/src/components/Modal/src/hooks/useModalDrag.ts b/src/components/Modal/src/hooks/useModalDrag.ts
index ff05b7b..220bfc4 100644
--- a/src/components/Modal/src/hooks/useModalDrag.ts
+++ b/src/components/Modal/src/hooks/useModalDrag.ts
@@ -36,7 +36,12 @@ export function useModalDragMove(context: UseModalDragMoveContext) {
 
       const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;
       const minDragDomTop = dragDom.offsetTop;
-      const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight;
+      let maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight;
+      //update-begin-author:liusq---date:20230407--for: [issue/430]弹出页面出现自动吸顶，无法移动和显示头部--- 
+      if(maxDragDomTop<0){
+        maxDragDomTop = screenHeight - dragDom.offsetTop
+      }
+      //update-end-author:liusq---date:20230407--for: [issue/430]弹出页面出现自动吸顶，无法移动和显示头部--- 
       // 获取到的值带px 正则匹配替换
       const domLeft = getStyle(dragDom, 'left');
       const domTop = getStyle(dragDom, 'top');