diff --git a/pqs-harmonic/harmonic-api/src/main/java/com/njcn/harmonic/utils/ClearPathUtil.java b/pqs-harmonic/harmonic-api/src/main/java/com/njcn/harmonic/utils/ClearPathUtil.java
index da04367e2..b21898e7b 100644
--- a/pqs-harmonic/harmonic-api/src/main/java/com/njcn/harmonic/utils/ClearPathUtil.java
+++ b/pqs-harmonic/harmonic-api/src/main/java/com/njcn/harmonic/utils/ClearPathUtil.java
@@ -93,8 +93,8 @@ public class ClearPathUtil {
                 return '<';
             case '>':
                 return '>';
-            case '':
-                return '';
+            case '`':
+                return '`';
             case '\\':
                 return '/';
             case 'I':