diff --git a/rule_instance.go b/rule_instance.go
index fef3498..e9a2961 100644
--- a/rule_instance.go
+++ b/rule_instance.go
@@ -29,7 +29,6 @@ func NewDefaultFieldRule(path string, dataType string, isRequired bool, defaultV
 			Min:      nil,
 			Max:      nil,
 			String: &define.StringValueLimit{
-				AutoTrimSpace:     true,
 				IncludeSubStrList: make([]string, 0),
 			},
 			Map: &define.MapValueLimit{IncludeFieldList: make([]string, 0)},