diff --git a/src/sql/plan_cache/ob_prepare_stmt_struct.cpp b/src/sql/plan_cache/ob_prepare_stmt_struct.cpp
index f6b0b4fc74..25a538d3ee 100644
--- a/src/sql/plan_cache/ob_prepare_stmt_struct.cpp
+++ b/src/sql/plan_cache/ob_prepare_stmt_struct.cpp
@@ -316,7 +316,8 @@ ObPsStmtInfo::ObPsStmtInfo(ObIAllocator *inner_allocator,
     raw_sql_(),
     raw_params_(inner_allocator),
     raw_params_idx_(inner_allocator),
-    literal_stmt_type_(stmt::T_NONE)
+    literal_stmt_type_(stmt::T_NONE),
+    erased_(false)
 {
 }
 
@@ -462,6 +463,7 @@ int ObPsStmtInfo::deep_copy(const ObPsStmtInfo &other)
     is_expired_ = other.is_expired_;
     is_expired_evicted_ = other.is_expired_evicted_;
     literal_stmt_type_ = other.literal_stmt_type_;
+    erased_ = other.erased_;
     if (other.get_dep_objs_cnt() > 0) {
       dep_objs_cnt_ = other.get_dep_objs_cnt();
       if (NULL == (dep_objs_ = reinterpret_cast<ObSchemaObjVersion *>
diff --git a/src/sql/plan_cache/ob_prepare_stmt_struct.h b/src/sql/plan_cache/ob_prepare_stmt_struct.h
index dc0cc131ae..9d0818c5c9 100644
--- a/src/sql/plan_cache/ob_prepare_stmt_struct.h
+++ b/src/sql/plan_cache/ob_prepare_stmt_struct.h
@@ -251,6 +251,7 @@ public:
   void set_is_expired() { ATOMIC_STORE(&is_expired_, true); }
   bool is_expired() { return ATOMIC_LOAD(&is_expired_); }
   bool *get_is_expired_evicted_ptr() { return &is_expired_evicted_; }
+  bool try_set_erase_flag() { return ATOMIC_BCAS(&erased_, false, true); }
 
   DECLARE_VIRTUAL_TO_STRING;
 
@@ -292,6 +293,7 @@ private:
   ObFixedArray<ObPCParam *, common::ObIAllocator> raw_params_;
   ObFixedArray<int64_t, common::ObIAllocator> raw_params_idx_;
   stmt::StmtType literal_stmt_type_;
+  volatile bool erased_;
 };
 
 struct TypeInfo {
diff --git a/src/sql/plan_cache/ob_ps_cache.cpp b/src/sql/plan_cache/ob_ps_cache.cpp
index b28b42a0a8..64a03cf4ee 100644
--- a/src/sql/plan_cache/ob_ps_cache.cpp
+++ b/src/sql/plan_cache/ob_ps_cache.cpp
@@ -152,6 +152,9 @@ int ObPsCache::deref_ps_stmt(const ObPsStmtId stmt_id, bool erase_item/*=false*/
     if (erase_item) { // dec cached ref
       if (OB_FAIL(erase_stmt_item(stmt_id, ps_sql_key))) {
         LOG_WARN("fail to erase stmt", K(ret));
+      } else if (ps_info->try_set_erase_flag() && OB_SUCCESS != (tmp_ret = deref_stmt_info(stmt_id))) {
+        ret = tmp_ret;
+        LOG_WARN("deref stmt info failed", K(ret), K(stmt_id), K(ps_sql_key));
       }
     } else { // dec session ref
       if (OB_ISNULL(ps_info->get_ps_item())) {
@@ -160,13 +163,12 @@ int ObPsCache::deref_ps_stmt(const ObPsStmtId stmt_id, bool erase_item/*=false*/
       } else {
         ps_info->get_ps_item()->dec_ref_count_check_erase();
       }
-    }
-
-    if (OB_SUCCESS != (tmp_ret = deref_stmt_info(stmt_id))) {
-      ret = tmp_ret; //previous ret ignore
-      LOG_WARN("deref stmt info failed", K(ret), K(stmt_id), K(ps_sql_key));
-    } else {
-      LOG_TRACE("deref stmt info success", K(stmt_id), K(ps_sql_key), K(ret));
+      if (OB_SUCCESS != (tmp_ret = deref_stmt_info(stmt_id))) {
+        ret = tmp_ret; //previous ret ignore
+        LOG_WARN("deref stmt info failed", K(ret), K(stmt_id), K(ps_sql_key));
+      } else {
+        LOG_TRACE("deref stmt info success", K(stmt_id), K(ps_sql_key), K(ret));
+      }
     }
   }
   return ret;