diff --git a/be/src/vec/columns/column_string.cpp b/be/src/vec/columns/column_string.cpp
index af0b7e14c366de..af2378fd02d3b0 100644
--- a/be/src/vec/columns/column_string.cpp
+++ b/be/src/vec/columns/column_string.cpp
@@ -40,8 +40,8 @@ template <typename T>
 void ColumnStr<T>::sanity_check() const {
 #ifndef NDEBUG
     sanity_check_simple();
-    auto count = cast_set<int>(offsets.size());
-    for (int i = 0; i < count; ++i) {
+    auto count = cast_set<int64_t>(offsets.size());
+    for (int64_t i = 0; i < count; ++i) {
         if (offsets[i] < offsets[i - 1]) {
             throw Exception(Status::InternalError("row count: {}, offsets[{}]: {}, offsets[{}]: {}",
                                                   count, i, offsets[i], i - 1, offsets[i - 1]));
@@ -53,7 +53,7 @@ void ColumnStr<T>::sanity_check() const {
 template <typename T>
 void ColumnStr<T>::sanity_check_simple() const {
 #ifndef NDEBUG
-    auto count = cast_set<int>(offsets.size());
+    auto count = cast_set<int64_t>(offsets.size());
     if (chars.size() != offsets[count - 1]) {
         throw Exception(Status::InternalError("row count: {}, chars.size(): {}, offset[{}]: {}",
                                               count, chars.size(), count - 1, offsets[count - 1]));
@@ -157,7 +157,15 @@ void ColumnStr<T>::insert_range_from_ignore_overflow(const doris::vectorized::IC
                     src_concrete.offsets[start + i] - nested_offset + prev_max_offset;
         }
     }
-    sanity_check_simple();
+
+#ifndef NDEBUG
+    auto count = cast_set<int64_t>(offsets.size());
+    // offsets may overflow, so we make chars.size() as T to do same overflow check
+    if (offsets.back() != T(chars.size())) {
+        throw Exception(Status::InternalError("row count: {}, chars.size(): {}, offset[{}]: {}",
+                                              count, chars.size(), count - 1, offsets[count - 1]));
+    }
+#endif
 }
 
 template <typename T>