diff --git a/.github/workflows/preview-pr-build.yaml b/.github/workflows/preview-pr-build.yaml
index b854dbf3..391d13a4 100644
--- a/.github/workflows/preview-pr-build.yaml
+++ b/.github/workflows/preview-pr-build.yaml
@@ -64,10 +64,30 @@ jobs:
           script: |
             const prNumber = context.payload.pull_request.number;
             const previewUrl = `${{ steps.deploy.outputs.url }}`;
-            const comment = `🚀 预览部署完成！ 访问链接: ${previewUrl}`;
-            github.rest.issues.createComment({
+            const commentBody = `🚀 预览部署完成！ 访问链接: ${previewUrl}`;
+            // 获取现有评论
+            const { data: comments } = await github.rest.issues.listComments({
               issue_number: prNumber,
               owner: context.repo.owner,
               repo: context.repo.repo,
-              body: comment,
             });
+            // 查找评论的关键词
+            const existingComment = comments.find(comment =>
+              comment.body.includes('🚀 预览部署完成！'));
+            if (existingComment) {
+              // 如果已经有评论，更新评论
+              await github.rest.issues.updateComment({
+                comment_id: existingComment.id,
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                body: commentBody,
+              });
+            } else {
+              // 如果没有评论，创建新的评论
+              await github.rest.issues.createComment({
+                issue_number: prNumber,
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                body: commentBody,
+              });
+            }