diff --git a/src/include/function/cast/functions/cast_string_non_nested_functions.h b/src/include/function/cast/functions/cast_string_non_nested_functions.h
index 550e845f5f..560406f6d6 100644
--- a/src/include/function/cast/functions/cast_string_non_nested_functions.h
+++ b/src/include/function/cast/functions/cast_string_non_nested_functions.h
@@ -233,10 +233,6 @@ inline bool tryIntegerCast(const char* input, uint64_t& len, IntegerCastData<T>&
         return integerCastLoop<T, true>(input, len, result);
     }
 
-    // not allow leading 0
-    if (len > 1 && *input == '0') {
-        return false;
-    }
     return integerCastLoop<T, false>(input, len, result);
 }