diff --git a/util/gvalid/gvalid_validator_rule_length.go b/util/gvalid/gvalid_validator_rule_length.go
index 33edfa97a..d692cc0bd 100644
--- a/util/gvalid/gvalid_validator_rule_length.go
+++ b/util/gvalid/gvalid_validator_rule_length.go
@@ -31,6 +31,8 @@ func (v *Validator) checkLength(value, ruleKey, ruleVal string, customMsgMap map
 		if len(array) > 0 {
 			if v, err := strconv.Atoi(strings.TrimSpace(array[0])); err == nil {
 				min = v
+				// compatible with only one parameter
+				max = v
 			}
 		}
 		if len(array) > 1 {
diff --git a/util/gvalid/gvalid_z_unit_basic_all_test.go b/util/gvalid/gvalid_z_unit_basic_all_test.go
index fa687880c..7bfd14a30 100755
--- a/util/gvalid/gvalid_z_unit_basic_all_test.go
+++ b/util/gvalid/gvalid_z_unit_basic_all_test.go
@@ -658,6 +658,17 @@ func Test_Length(t *testing.T) {
 	if m := gvalid.CheckValue(context.TODO(), "12345", rule, nil); m == nil {
 		t.Error("长度校验失败")
 	}
+	// only one parameter
+	rule2 := "length:5"
+	if m := gvalid.CheckValue(context.TODO(), "1234", rule2, nil); m == nil {
+		t.Error(m)
+	}
+	if m := gvalid.CheckValue(context.TODO(), "12345", rule2, nil); m != nil {
+		t.Error(m)
+	}
+	if m := gvalid.CheckValue(context.TODO(), "123456", rule2, nil); m == nil {
+		t.Error("长度校验失败")
+	}
 }
 
 func Test_MinLength(t *testing.T) {