diff --git a/lib/utils/em.dart b/lib/utils/em.dart
index 68eed977..8dba2c13 100644
--- a/lib/utils/em.dart
+++ b/lib/utils/em.dart
@@ -19,6 +19,10 @@ class Em {
       return regCate(matchStr);
     }, onNonMatch: (String str) {
       if (str != '') {
+        str = str
+            .replaceAll('>', '>')
+            .replaceAll('"', '"')
+            .replaceAll(''', "'");
         Map map = {'type': 'text', 'text': str};
         res.add(map);
       }