diff --git a/components/image-annotator.tsx b/components/image-annotator.tsx
index 5f8233389..384fa8c05 100644
--- a/components/image-annotator.tsx
+++ b/components/image-annotator.tsx
@@ -92,8 +92,8 @@ export function ImageAnnotator({ imageUrl, onConfirm, onCancel }: ImageAnnotator
     const context = canvas.getContext("2d");
     if (!context) return;
 
-    // 弹窗内画布区域大小（减去工具栏和边距）
-    const containerWidth = 800; // 850 - padding
+    // 弹窗内画布区域大小（减去工具栏和边距，考虑并排显示）
+    const containerWidth = processedImageBase64 ? 550 : 1100; // 如果有处理后图片，每个区域550px；否则1100px
     const containerHeight = 350; // 550 - 工具栏高度
     const scaleX = containerWidth / image.width;
     const scaleY = containerHeight / image.height;