diff --git a/builder.go b/builder.go
index 95a44ff..f5147ba 100644
--- a/builder.go
+++ b/builder.go
@@ -1,6 +1,11 @@
 package dynamicstruct
 
-import "reflect"
+import (
+	"fmt"
+	"git.zhangdeman.cn/zhangdeman/wrapper"
+	"reflect"
+	"strings"
+)
 
 type (
 	// Builder 运行时动态生成结构体的接口约束
@@ -39,8 +44,17 @@ type (
 		NewMapOfStructs(key any) any
 	}
 
+	nestedStruct struct {
+		Field   string
+		Builder Builder
+		Tag     string
+	}
+
 	builderImpl struct {
-		fields []*fieldConfigImpl
+		fields            []*fieldConfigImpl
+		nestedStructTable map[string]nestedStruct // 嵌套结构体的定义, 父级路径 => 父级路径下挂接的子路径
+		maxFieldDeep      int                     // 字段嵌套最大深度
+		structTagTable    map[string]string       // 字段路径 => json tag，最高优先级, 没传的时候会使用AddField的tag, 也为空使用手搓json tag
 	}
 
 	fieldConfigImpl struct {
@@ -52,14 +66,18 @@ type (
 	}
 
 	dynamicStructImpl struct {
-		definition reflect.Type
+		structFields []reflect.StructField
+		definition   reflect.Type
 	}
 )
 
 // NewStruct 获取builder实例
-func NewStruct() Builder {
+// 传入的tag映射表: 字段路径 => json tag，最高优先级, 没传的时候会使用AddField的tag, 也为空使用手搓json tag
+func NewStruct(structTagTable map[string]string) Builder {
 	return &builderImpl{
-		fields: []*fieldConfigImpl{},
+		fields:            []*fieldConfigImpl{},
+		nestedStructTable: make(map[string]nestedStruct),
+		structTagTable:    structTagTable,
 	}
 }
 
@@ -70,7 +88,7 @@ func ExtendStruct(value ...any) Builder {
 
 // MergeStructs 多个结构体合并成一个动态结构体
 func MergeStructs(values ...any) Builder {
-	builder := NewStruct()
+	builder := NewStruct(map[string]string{})
 
 	for _, value := range values {
 		valueOf := reflect.Indirect(reflect.ValueOf(value))
@@ -86,14 +104,44 @@ func MergeStructs(values ...any) Builder {
 	return builder
 }
 
+// IsNestedField 判断是否是嵌套结构体
+func (b *builderImpl) parseNestedField(fieldName string) ([]string, bool) {
+	fieldNameArr := strings.Split(strings.Trim(fieldName, "."), ".")
+	return fieldNameArr, len(fieldNameArr) > 1
+}
+
 // AddField 添加结构体字段
 func (b *builderImpl) AddField(name string, pkg string, typ any, tag string, anonymous bool) Builder {
+	// 瞎话线转驼峰, 传入的name实际对应序列化时的json tag
+	// name = wrapper.String(name).SnakeCaseToCamel()
+	if cfgTag, exist := b.structTagTable[name]; exist && len(cfgTag) > 0 {
+		tag = cfgTag
+	} else {
+		if len(tag) == 0 {
+			tag = fmt.Sprintf(`json:"%s"`, name)
+		}
+	}
+	// 判断是否嵌套结构体
+	fieldNameArr, isNestedField := b.parseNestedField(name)
+	if !isNestedField {
+		// 普通字段
+		b.addNormalField(name, pkg, typ, tag, anonymous)
+		return b
+	}
+	// 添加嵌套的结构体
+	b.addNestedField(fieldNameArr, pkg, typ, tag, anonymous)
+	return b
+}
+
+// addNormalField 添加普通无嵌套的字段
+func (b *builderImpl) addNormalField(name string, pkg string, typ any, tag string, anonymous bool) {
+	name = wrapper.String(name).SnakeCaseToCamel()
 	if existFieldCfg := b.GetField(name); nil != existFieldCfg {
 		// 说明已存在指定名称字段
 		// 重复添加, 则会议后面的标签以及类型, 覆盖前面的值
 		existFieldCfg.SetTag(tag)
 		existFieldCfg.SetType(typ)
-		return b
+		return
 	}
 	b.fields = append(b.fields, &fieldConfigImpl{
 		name:      name,
@@ -102,7 +150,44 @@ func (b *builderImpl) AddField(name string, pkg string, typ any, tag string, ano
 		anonymous: anonymous,
 		pkg:       pkg,
 	})
-	return b
+}
+
+// addNestedField 添加嵌套字段
+func (b *builderImpl) addNestedField(nameArr []string, pkg string, typ any, tag string, anonymous bool) {
+	if len(nameArr) == 1 {
+		// 说明已经是最顶层结构了
+		b.addNormalField(nameArr[0], pkg, typ, tag, anonymous)
+		return
+	}
+	if len(nameArr) > b.maxFieldDeep {
+		// 设置字段嵌套的最大深度, 由于生成结构体确认深度使用
+		b.maxFieldDeep = len(nameArr)
+	}
+	for i := len(nameArr) - 1; i > 0; i-- {
+		jsonTag := nameArr[i]
+		fieldName := wrapper.String(jsonTag).SnakeCaseToCamel()
+		parentName := strings.Join(nameArr[:i], ".")
+		parentJsonTag := nameArr[i-1]
+		parentFieldName := wrapper.String(parentJsonTag).SnakeCaseToCamel()
+		fieldTag := fmt.Sprintf(`json:"%s"`, parentJsonTag)
+		if tagCfg, exist := b.structTagTable[parentName]; exist && len(tagCfg) > 0 {
+			fieldTag = tagCfg
+		}
+		if len(parentName) > 0 {
+			if _, exist := b.nestedStructTable[parentName]; !exist {
+				b.nestedStructTable[parentName] = nestedStruct{
+					Field:   parentFieldName,
+					Builder: NewStruct(b.structTagTable),
+					Tag:     fieldTag,
+				}
+			}
+		}
+		if i == len(nameArr)-1 {
+			// 最深层此字段, 直接追加到他的父级结构体中即可
+			b.nestedStructTable[parentName].Builder.AddField(fieldName, pkg, typ, tag, anonymous)
+			continue
+		}
+	}
 }
 
 // RemoveField 根据名称移除结构体字段
@@ -140,8 +225,26 @@ func (b *builderImpl) GetField(name string) FieldConfig {
 
 // Build 构建动态结构体
 func (b *builderImpl) Build() DynamicStruct {
+	// 按照嵌套深度, 进行一次回溯处理
+	for deep := b.maxFieldDeep - 1; deep > 0; deep-- {
+		// 嵌套数据结构
+		for parentIndex, builderCfg := range b.nestedStructTable {
+			parentNameArr := strings.Split(parentIndex, ".")
+			if len(parentNameArr) != deep {
+				// 从深度最深处向上处理
+				continue
+			}
+			if deep == 1 {
+				// 说明是顶层了
+				b.AddField(builderCfg.Field, "", builderCfg.Builder.Build().New(), builderCfg.Tag, false)
+			} else {
+				// (非顶层) 父级结构存在, 将其追加到父级结构中即可, 向前看一步即为父级结构
+				b.nestedStructTable[strings.Join(parentNameArr[:len(parentNameArr)-1], ".")].Builder.AddField(builderCfg.Field, "", builderCfg.Builder.Build().New(), builderCfg.Tag, false)
+			}
+		}
+	}
+	// 一级字段属性
 	var structFields []reflect.StructField
-
 	for _, field := range b.fields {
 		structFields = append(structFields, reflect.StructField{
 			Name:      field.name,
@@ -151,9 +254,9 @@ func (b *builderImpl) Build() DynamicStruct {
 			Anonymous: field.anonymous,
 		})
 	}
-
 	return &dynamicStructImpl{
-		definition: reflect.StructOf(structFields),
+		structFields: structFields,
+		definition:   reflect.StructOf(structFields),
 	}
 }
 
diff --git a/builder_test.go b/builder_test.go
index 73bc22b..66274e6 100644
--- a/builder_test.go
+++ b/builder_test.go
@@ -1,6 +1,6 @@
 // Package dynamicstruct ...
 //
-// Description : dynamicstruct ...
+// Description : dynamic struct ...
 //
 // Author : go_developer@163.com<白茶清欢>
 //
@@ -10,20 +10,24 @@ package dynamicstruct
 import (
 	"encoding/json"
 	"fmt"
-	"reflect"
 	"testing"
 )
 
 func Test_dynamicStructImpl_New(t *testing.T) {
 	instance := NewStruct().
-		AddField("Integer", "", 0, `json:"int"`, false).
+		/*AddField("Integer", "", 0, `json:"int"`, false).
 		AddField("Text", "", "", `json:"someText"`, false).
 		AddField("Float", "", 0.0, `json:"double"`, false).
 		AddField("Boolean", "", false, "", false).
 		AddField("Slice", "", []int{}, "", false).
-		AddField("Anonymous", "", "", `json:"-"`, false).
-		Build().
-		New()
+		AddField("Anonymous", "", "", `json:"-"`, false).*/
+		AddField("user.base.age", "", 20, `json:"age"`, false).
+		AddField("user.base.name", "", "", `json:"name"`, false).
+		AddField("user.job.address", "", "", `json:"address"`, false).
+		AddField("user.job.company.name", "", "", `json:"name"`, false).
+		Build()
+
+	val := instance.New()
 
 	data := []byte(`
 {
@@ -32,10 +36,13 @@ func Test_dynamicStructImpl_New(t *testing.T) {
     "double": 123.45,
     "Boolean": true,
     "Slice": [1, 2, 3],
+    "user": {"job":{"address":"beijing","company":{"name":"unknown"}}, "base":{"age": 1800, "name":"baicha"}},
     "Anonymous": "avoid to read"
 }
 `)
-	err := json.Unmarshal(data, &instance)
-	fmt.Println(err)
-	fmt.Println(reflect.ValueOf(instance).Elem().FieldByName("Integer").Interface())
+	err := json.Unmarshal(data, &val)
+	fmt.Println(err, val)
+	valByte, _ := json.Marshal(val)
+	fmt.Println(string(valByte))
+	// fmt.Println(reflect.ValueOf(val).Elem().FieldByName("Integer").Interface())
 }
diff --git a/go.mod b/go.mod
index 138da8a..b027de9 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,19 @@
 module git.zhangdeman.cn/zhangdeman/dynamic-struct
 
 go 1.24.1
+
+require (
+	git.zhangdeman.cn/zhangdeman/consts v0.0.0-20250227040546-863c03f34bb8 // indirect
+	git.zhangdeman.cn/zhangdeman/op_type v0.0.0-20240122104027-4928421213c0 // indirect
+	git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20241223084948-de2e49144fcd // indirect
+	git.zhangdeman.cn/zhangdeman/util v0.0.0-20240618042405-6ee2c904644e // indirect
+	git.zhangdeman.cn/zhangdeman/wrapper v0.0.0-20250302133417-c1588abcb436 // indirect
+	github.com/BurntSushi/toml v1.5.0 // indirect
+	github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394 // indirect
+	github.com/go-ini/ini v1.67.0 // indirect
+	github.com/spaolacci/murmur3 v1.1.0 // indirect
+	github.com/tidwall/gjson v1.18.0 // indirect
+	github.com/tidwall/match v1.1.1 // indirect
+	github.com/tidwall/pretty v1.2.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..443b25d
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,28 @@
+git.zhangdeman.cn/zhangdeman/consts v0.0.0-20250227040546-863c03f34bb8 h1:VEifPc+vkpEQoX9rj7zxmT1m+IA81XjOxe7+Z1aqWNM=
+git.zhangdeman.cn/zhangdeman/consts v0.0.0-20250227040546-863c03f34bb8/go.mod h1:IXXaZkb7vGzGnGM5RRWrASAuwrVSNxuoe0DmeXx5g6k=
+git.zhangdeman.cn/zhangdeman/op_type v0.0.0-20240122104027-4928421213c0 h1:gUDlQMuJ4xNfP2Abl1Msmpa3fASLWYkNlqDFF/6GN0Y=
+git.zhangdeman.cn/zhangdeman/op_type v0.0.0-20240122104027-4928421213c0/go.mod h1:VHb9qmhaPDAQDcS6vUiDCamYjZ4R5lD1XtVsh55KsMI=
+git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20241223084948-de2e49144fcd h1:q7GG14qgXKB4MEXQFOe7/UYebsqMfPaSX80TcPdOosI=
+git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20241223084948-de2e49144fcd/go.mod h1:+D6uPSljwHywjVY5WSBY4TRVMj26TN5f5cFGEYMldjs=
+git.zhangdeman.cn/zhangdeman/util v0.0.0-20240618042405-6ee2c904644e h1:Q973S6CcWr1ICZhFI1STFOJ+KUImCl2BaIXm6YppBqI=
+git.zhangdeman.cn/zhangdeman/util v0.0.0-20240618042405-6ee2c904644e/go.mod h1:VpPjBlwz8U+OxZuxzHQBv1aEEZ3pStH6bZvT21ADEbI=
+git.zhangdeman.cn/zhangdeman/wrapper v0.0.0-20250302133417-c1588abcb436 h1:SM4zc54W2wmM72+4pMNQ8iS371H6lj4J8rj8KJKf7pw=
+git.zhangdeman.cn/zhangdeman/wrapper v0.0.0-20250302133417-c1588abcb436/go.mod h1:YJ1FlvFgkfAHkxkt3l5rKKUqEpQkNMbCFDzDmgteEU8=
+github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
+github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394 h1:OYA+5W64v3OgClL+IrOD63t4i/RW7RqrAVl9LTZ9UqQ=
+github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394/go.mod h1:Q8n74mJTIgjX4RBBcHnJ05h//6/k6foqmgE45jTQtxg=
+github.com/go-ini/ini v1.67.0 h1:z6ZrTEZqSWOTyH2FlglNbNgARyHG8oLW9gMELqKr06A=
+github.com/go-ini/ini v1.67.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
+github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0bLI=
+github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
+github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
+github.com/tidwall/gjson v1.18.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
+github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
+github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
+github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+github.com/tidwall/pretty v1.2.1 h1:qjsOFOWWQl+N3RsoF5/ssm1pHmJJwhjlSbZ51I6wMl4=
+github.com/tidwall/pretty v1.2.1/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=