diff --git a/web/template/syzoj/problem.php b/web/template/syzoj/problem.php
index 6691b1e..25f8109 100644
--- a/web/template/syzoj/problem.php
+++ b/web/template/syzoj/problem.php
@@ -128,15 +128,15 @@ if ($pr_flag) {
         strpos($s, "class=\"md") === false
       )  // 没找到，那就加上
         $s = "<span class='md'>" . $s . "</span>";
-      // 删除代码块里的<br />防止引起混乱
+      // 删除代码块里的html字符防止引起混乱
       $s = preg_replace_callback('/(```.*?```|`[^`]*`)/s', function ($matches) {
-        return str_replace('<br />', '', $matches[0]);
+        $ss = str_replace('<br />', '', $matches[0]);
+        // 大于小于号
+        $ss = htmlspecialchars_decode($ss, ENT_QUOTES | ENT_HTML5);
+        return $ss;
       }, $s);
       // 特殊转义
       $s = str_replace("<br />", "\n", $s);
-      // 大于小于号
-      $s = str_replace("&lt;", "<", $s);
-      $s = str_replace("&gt;", ">", $s);
       return $s;
     }
     ?>