diff --git a/services/ptable_parse/ptable.h b/services/ptable_parse/ptable.h
index 01a74a9506fbbbd0d69859abbb3ccc524cd2dc0f..d49aefbe79ea5a08a0c2195e1b0779bb49819a24 100644
--- a/services/ptable_parse/ptable.h
+++ b/services/ptable_parse/ptable.h
@@ -89,6 +89,11 @@ public:
         return hasTailpart_;
     }
 
+    void ClearPtnInfo()
+    {
+        partitionInfo_.clear();
+    }
+
 #ifndef UPDATER_UT
 protected:
 #else