diff --git a/src/components/spray/trayGraph/index.vue b/src/components/spray/trayGraph/index.vue
index 4e55508..9ba59d0 100644
--- a/src/components/spray/trayGraph/index.vue
+++ b/src/components/spray/trayGraph/index.vue
@@ -62,6 +62,12 @@ const addSelect = () => {
     height: (75 - 15 * 2) * zoom,
     fill: 'rgba(238,10,36, 0.2)',
     draggable: true,
+    dragBoundFunc(pos) {
+      return {
+        x: 0, // X坐标保持不变
+        y: pos.y, // 允许Y坐标变化
+      }
+    },
   })
 
   // 在onMounted中rect创建后添加拖拽监听