diff --git a/src/util/inc/tconfig.h b/src/util/inc/tconfig.h
index a680b7dd26e93dc6d0fa1973abc96afacd240ca9..a61381b31b498ae770264b488bf6fbc28d4e9407 100644
--- a/src/util/inc/tconfig.h
+++ b/src/util/inc/tconfig.h
@@ -32,8 +32,8 @@ extern "C" {
 #define TSDB_CFG_CTYPE_B_OPTION    16U  // can be configured by taos_options function
 #define TSDB_CFG_CTYPE_B_NOT_PRINT 32U  // such as password
 
-#define MAXFLOAT    1E+120
-#define MINFLOAT   -1E+120
+#define MAXFLOAT    1E+20
+#define MINFLOAT   -1E+20
 
 enum {
   TAOS_CFG_CSTATUS_NONE,     // not configured