diff --git a/src/components/hazard_inspect/timeline/timeline.ts b/src/components/hazard_inspect/timeline/timeline.ts
index 43d86e0..005f3d6 100644
--- a/src/components/hazard_inspect/timeline/timeline.ts
+++ b/src/components/hazard_inspect/timeline/timeline.ts
@@ -96,6 +96,8 @@ export function useTimeline(
 
     if (Math.abs(newMinPxPerFrame - minPxPerFrame.value) > 0.01) {
       minPxPerFrame.value = newMinPxPerFrame
+      // 将当前缩放比例设置为最小缩放比例，确保时间线能够完整显示所有帧
+      setZoom(minPxPerFrame.value)
     }
   }