diff --git a/readme.md b/readme.md
index 016889bb121d..5f6c211cd389 100644
--- a/readme.md
+++ b/readme.md
@@ -1,5 +1,8 @@
 ## change
 
+### 修改
+支持自定义time类型 JsonTime
+如果time类型字段有默认值，生成gorm字段时标识为只读字段
 ### 支持`gorm`风格的`model`生成
 
 - ddl
diff --git a/tools/goctl/model/sql/gen/field.go b/tools/goctl/model/sql/gen/field.go
index 70a10ca01911..89215d462935 100644
--- a/tools/goctl/model/sql/gen/field.go
+++ b/tools/goctl/model/sql/gen/field.go
@@ -53,7 +53,7 @@ func genField(table Table, field *parser.Field) (string, error) {
 }
 
 func genGormField(table Table, field *parser.Field) (string, error) {
-	tag, err := genGormTag(table, field.NameOriginal)
+	tag, err := genGormTag(table, field)
 	if err != nil {
 		return "", err
 	}
@@ -87,7 +87,7 @@ func genGormFields(table Table, fields []*parser.Field) (string, error) {
 		if err != nil {
 			return "", err
 		}
-
+		result = strings.ReplaceAll(result, "time.Time", "JsonTime")
 		list = append(list, result)
 	}
 
diff --git a/tools/goctl/model/sql/gen/gen_gorm.go b/tools/goctl/model/sql/gen/gen_gorm.go
index ddedf0833261..8620bbd280d1 100644
--- a/tools/goctl/model/sql/gen/gen_gorm.go
+++ b/tools/goctl/model/sql/gen/gen_gorm.go
@@ -3,6 +3,9 @@ package gen
 import (
 	"bytes"
 	"fmt"
+	"os"
+	"path/filepath"
+
 	"github.com/zeromicro/go-zero/tools/goctl/config"
 	"github.com/zeromicro/go-zero/tools/goctl/model/sql/model"
 	"github.com/zeromicro/go-zero/tools/goctl/model/sql/parser"
@@ -11,8 +14,6 @@ import (
 	"github.com/zeromicro/go-zero/tools/goctl/util/format"
 	"github.com/zeromicro/go-zero/tools/goctl/util/pathx"
 	"github.com/zeromicro/go-zero/tools/goctl/util/stringx"
-	"os"
-	"path/filepath"
 )
 
 type GormGenerator struct {
@@ -136,7 +137,7 @@ func (g *GormGenerator) createFile(modelList map[string]*codeTuple) error {
 
 		name := util.SafeString(modelFilename) + "_gen.go"
 		filename := filepath.Join(dirAbs, name)
-		err = os.WriteFile(filename, []byte(codes.modelCode), os.ModePerm)
+		err = os.WriteFile(filename, []byte(codes.modelCode), 0644)
 		if err != nil {
 			return err
 		}
@@ -147,7 +148,7 @@ func (g *GormGenerator) createFile(modelList map[string]*codeTuple) error {
 			g.Warning("%s already exists, ignored.", name)
 			continue
 		}
-		err = os.WriteFile(filename, []byte(codes.modelCustomCode), os.ModePerm)
+		err = os.WriteFile(filename, []byte(codes.modelCustomCode), 0644)
 		if err != nil {
 			return err
 		}
diff --git a/tools/goctl/model/sql/gen/imports.go b/tools/goctl/model/sql/gen/imports.go
index b1f8910c33cc..4d91377d7a97 100644
--- a/tools/goctl/model/sql/gen/imports.go
+++ b/tools/goctl/model/sql/gen/imports.go
@@ -49,7 +49,7 @@ func gormGenImports(timeImport bool) (string, error) {
 	}
 
 	buffer, err := util.With("import").Parse(text).Execute(map[string]any{
-		"time": timeImport,
+		"time": false, //use JsonTime not need import time.Time more details see gorm-err.tpl
 	})
 	if err != nil {
 		return "", err
diff --git a/tools/goctl/model/sql/gen/tag.go b/tools/goctl/model/sql/gen/tag.go
index b0dda4bf704c..0db91ff7ef77 100644
--- a/tools/goctl/model/sql/gen/tag.go
+++ b/tools/goctl/model/sql/gen/tag.go
@@ -1,6 +1,7 @@
 package gen
 
 import (
+	"github.com/zeromicro/go-zero/tools/goctl/model/sql/parser"
 	"github.com/zeromicro/go-zero/tools/goctl/model/sql/template"
 	"github.com/zeromicro/go-zero/tools/goctl/util"
 	"github.com/zeromicro/go-zero/tools/goctl/util/pathx"
@@ -27,7 +28,8 @@ func genTag(table Table, in string) (string, error) {
 	return output.String(), nil
 }
 
-func genGormTag(table Table, in string) (string, error) {
+func genGormTag(table Table, field *parser.Field) (string, error) {
+	in := field.NameOriginal
 	if in == "" {
 		return in, nil
 	}
@@ -37,8 +39,9 @@ func genGormTag(table Table, in string) (string, error) {
 	}
 
 	output, err := util.With("tag").Parse(text).Execute(map[string]any{
-		"field": in,
-		"data":  table,
+		"field":                    in,
+		"isTimeAndHasDefaultValue": field.IsTime && field.HasDefaultValue,
+		"data":                     table,
 	})
 	if err != nil {
 		return "", err
diff --git a/tools/goctl/model/sql/parser/parser.go b/tools/goctl/model/sql/parser/parser.go
index e25ca567eb46..466f83413045 100644
--- a/tools/goctl/model/sql/parser/parser.go
+++ b/tools/goctl/model/sql/parser/parser.go
@@ -45,6 +45,8 @@ type (
 		SeqInIndex      int
 		OrdinalPosition int
 		ContainsPQ      bool
+		HasDefaultValue bool
+		IsTime          bool
 	}
 
 	// KeyType types alias of int
@@ -246,7 +248,8 @@ func convertColumns(columns []*parser.Column, primaryColumn string, strict bool,
 		field.Name = stringx.From(column.Name)
 		field.DataType = dataType
 		field.Comment = util.TrimNewLine(comment)
-
+		field.HasDefaultValue = column.Constraint.HasDefaultValue
+		field.IsTime = field.DataType == timeImport
 		if field.Name.Source() == primaryColumn {
 			primaryKey = Primary{
 				Field: field,
@@ -380,6 +383,8 @@ func getTableFields(table *model.Table, strict bool, args ...bool) (map[string]*
 			SeqInIndex:      columnSeqInIndex,
 			OrdinalPosition: each.OrdinalPosition,
 			ContainsPQ:      containsPQ,
+			IsTime:          dt == timeImport,
+			HasDefaultValue: each.ColumnDefault != nil,
 		}
 		fieldM[each.Name] = field
 	}
diff --git a/tools/goctl/model/sql/template/tpl/gorm-err.tpl b/tools/goctl/model/sql/template/tpl/gorm-err.tpl
index 354c3b14a100..3230b65f73c8 100644
--- a/tools/goctl/model/sql/template/tpl/gorm-err.tpl
+++ b/tools/goctl/model/sql/template/tpl/gorm-err.tpl
@@ -2,6 +2,9 @@ package {{.pkg}}
 
 import (
 	"errors"
+	"fmt"
+	"time"
+
 	"gorm.io/gorm"
 )
 
@@ -10,4 +13,11 @@ func IgnoreRecordNotFound(err error) error {
 		err = nil
 	}
 	return err
-}
\ No newline at end of file
+}
+
+type JsonTime time.Time
+
+func (t JsonTime) MarshalJSON() ([]byte, error) {
+	var stamp = fmt.Sprintf("\"%s\"", time.Time(t).Format("2006-01-02 15:04:05"))
+	return []byte(stamp), nil
+}
diff --git a/tools/goctl/model/sql/template/tpl/gorm-tag.tpl b/tools/goctl/model/sql/template/tpl/gorm-tag.tpl
index 31701e255865..5ab2148df7fe 100644
--- a/tools/goctl/model/sql/template/tpl/gorm-tag.tpl
+++ b/tools/goctl/model/sql/template/tpl/gorm-tag.tpl
@@ -1 +1 @@
-`gorm:"column:{{.field}}"`
\ No newline at end of file
+{{if .isTimeAndHasDefaultValue}}`gorm:"column:{{.field}};->" json:"{{.field}}"`{{else}}`gorm:"column:{{.field}}" json:"{{.field}}"`{{end}}
\ No newline at end of file