diff --git a/scripts/diff.py b/scripts/diff.py
index 083483c..5e3bcc4 100644
--- a/scripts/diff.py
+++ b/scripts/diff.py
@@ -43,27 +43,30 @@ def main() -> None:
         added_rules, removed_rules, updated_rules = get_diff_rules(OLD_JSON, NEW_JSON)
 
         with open(DIFF_MARKDOWN, "w", encoding="utf-8") as f:
-            f.write("## 新增规则\n")
-            f.write("|规则|示例|\n")
-            f.write("|----|----|\n")
-            for rule in added_rules:
-                f.write(rule.to_markdown_tr(verbose=False))
+            if added_rules:
+                f.write("## 新增规则\n")
+                f.write("|规则|示例|\n")
+                f.write("|----|----|\n")
+                for rule in added_rules:
+                    f.write(rule.to_markdown_tr(verbose=False) + "\n")
 
             f.write("\n")
 
-            f.write("## 更新规则\n")
-            f.write("|规则|示例|\n")
-            f.write("|----|----|\n")
-            for rule in updated_rules:
-                f.write(rule.to_markdown_tr(verbose=False))
+            if updated_rules:
+                f.write("## 更新规则\n")
+                f.write("|规则|示例|\n")
+                f.write("|----|----|\n")
+                for rule in updated_rules:
+                    f.write(rule.to_markdown_tr(verbose=False) + "\n")
 
             f.write("\n")
 
-            f.write("## 移除规则\n")
-            f.write("|规则|示例|\n")
-            f.write("|----|----|\n")
-            for rule in removed_rules:
-                f.write(rule.to_markdown_tr(verbose=False))
+            if removed_rules:
+                f.write("## 移除规则\n")
+                f.write("|规则|示例|\n")
+                f.write("|----|----|\n")
+                for rule in removed_rules:
+                    f.write(rule.to_markdown_tr(verbose=False) + "\n")
     except Exception as e:
         print(e)
         exit(1)
diff --git a/scripts/utils.py b/scripts/utils.py
index 4d60d5f..4119308 100644
--- a/scripts/utils.py
+++ b/scripts/utils.py
@@ -115,7 +115,7 @@ def to_markdown_tr(self, verbose: bool = False) -> str:
         Returns:
             str: Markdown 表格行
         """
-        filter_markdown = f"`{self.filter}`"
+        filter_markdown = f"`{self.filter.replace("|", "\|")}`"
 
         if self.examples:
             examples_markdown = "、".join([f"`{example}`" for example in self.examples])