diff --git a/src/dao/user_dao.go b/src/dao/user_dao.go
index 41514a5..865f277 100644
--- a/src/dao/user_dao.go
+++ b/src/dao/user_dao.go
@@ -3,7 +3,7 @@ package dao
 import (
 	"lingye-gin/src/config"
 	"lingye-gin/src/entity"
-	"lingye-gin/src/service/dto"
+	"lingye-gin/src/service/query"
 	"lingye-gin/src/util"
 )
 
@@ -36,29 +36,37 @@ func (UserDAO) SelectList(resource entity.User) []entity.User {
 }
 
 // 条件分页查询
-func (UserDAO) SelectPage(dto dto.UserDTO) []entity.User {
+func (UserDAO) SelectPage(condition query.UserQuery) ([]entity.User, int) {
 	var users []entity.User
+	var total int
 
-	page, pageSize := util.FixPage(dto.Page, dto.PageSize)
+	page, pageSize := util.FixPage(condition.Page, condition.PageSize)
 	// 分页条件
-	pageConfig := config.SqlExcutor.Where("username LIKE ?", "%"+dto.Username+"%")
+	pageConfig := config.SqlExcutor.Where("username LIKE ?", "%"+condition.Username+"%")
 	// 分页参数
 	pageConfig = pageConfig.Limit((page - 1) * pageSize).Offset(pageSize)
-	pageConfig.Find(&users)
-	return users
+	pageConfig = pageConfig.Find(&users)
+	// 统计数量
+	pageConfig.Count(&total)
+	return users, total
 }
 
-func test() {
-	//
-	//user := entity.User{Username: "lingye"}
-	//
-	//userDAO := dao.UserDAO{}
-	//userDAO.Insert(&user)
-	//userDAO.SelectAll()
-	//userDAO.SelectOne(1)
-	//userDAO.SelectList(user)
-	//
-	//dto := dto2.UserDTO{}
-	//dto.Username = "测试"
-	//userDAO.SelectPage(dto)
+func (UserDAO) UpdateAll(user *entity.User) {
+	config.SqlExcutor.Save(&user)
+}
+
+// 更新特定字段
+func (UserDAO) UpdateById(user *entity.User) {
+	model := &entity.User{}
+	model.ID = user.ID
+	config.SqlExcutor.Model(model).Updates(map[string]interface{}{
+		"username": user.UserName,
+	})
+}
+
+// 删除
+func (UserDAO) DeleteById(id uint) {
+	user := entity.User{}
+	user.ID = id
+	config.SqlExcutor.Delete(&user)
 }
diff --git a/src/entity/user.go b/src/entity/user.go
index c1e5f44..a3a0405 100644
--- a/src/entity/user.go
+++ b/src/entity/user.go
@@ -5,16 +5,16 @@ import (
 )
 
 type User struct {
-	base.BaseDO
-	UserName    string `gorm:"column:user_name;type:varchar(255);not null;index:idx_username" json:"username" form:"username"`
-	NickName    string `gorm:"column:nick_name;type:varchar(255)" json:"nickname" form:"nickname"`
-	Email       string `gorm:"column:email;type:varchar(255)" json:"email" form:"email"`
-	PhoneNumber string `gorm:"column:phone_number;type:varchar(255)" json:"phoneNumber" form:"phoneNumber"`
-	Sex         string `gorm:"column:sex;type:varchar(255)" json:"sex" form:"sex"`
-	Avatar      string `gorm:"column:avatar;type:varchar(255)" json:"avatar" form:"avatar"`
-	Password    string `gorm:"column:password;type:varchar(255);not null" json:"password" form:"password"`
-	Status      string `gorm:"column:status;type:varchar(255);not null" json:"status" form:"status"`
-	Remark      string `gorm:"column:remark;type:text(0)" json:"remark" form:"remark"`
+	base.LingYeDO
+	UserName    string `gorm:"column:user_name;type:varchar(255);not null;index:idx_username"`
+	NickName    string `gorm:"column:nick_name;type:varchar(255)"`
+	Email       string `gorm:"column:email;type:varchar(255)"`
+	PhoneNumber string `gorm:"column:phone_number;type:varchar(255)"`
+	Sex         string `gorm:"column:sex;type:varchar(255)"`
+	Avatar      string `gorm:"column:avatar;type:varchar(255)"`
+	Password    string `gorm:"column:password;type:varchar(255);not null"`
+	Status      string `gorm:"column:status;type:varchar(255);not null"`
+	Remark      string `gorm:"column:remark;type:text(0)"`
 }
 
 // 设置User的表名为`sys_user`
diff --git a/src/rest/api/student_rest.go b/src/rest/api/student_rest.go
deleted file mode 100644
index 6917f6e..0000000
--- a/src/rest/api/student_rest.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package api
-
-import (
-	"github.com/gin-gonic/gin"
-)
-
-type Student struct {
-	ID       uint   `json:"id"`
-	Username string `json:"username"`
-	Age      uint   `json:"age"`
-}
-
-func DescribeStudents(c *gin.Context) {
-	var students []Student
-	c.JSON(200, gin.H{
-		"data":     students,
-		"page":     1,
-		"pageSize": 15,
-	})
-}
diff --git a/src/rest/api/user_rest.go b/src/rest/api/user_rest.go
new file mode 100644
index 0000000..dd3b0e4
--- /dev/null
+++ b/src/rest/api/user_rest.go
@@ -0,0 +1,91 @@
+package api
+
+import (
+	"github.com/gin-gonic/gin"
+	"lingye-gin/src/service"
+	"lingye-gin/src/service/dto"
+	"lingye-gin/src/service/query"
+	"net/http"
+	"strconv"
+)
+
+func DescribeUsers(c *gin.Context) {
+	var userQuery query.UserQuery
+	_ = c.BindJSON(&userQuery)
+
+	users, total := new(service.UserService).DescribeUsers(userQuery)
+	c.JSON(http.StatusOK, gin.H{
+		"code":  http.StatusOK,
+		"data":  users,
+		"total": total,
+	})
+}
+
+func DescribeUserById(c *gin.Context) {
+	id := c.Params.ByName("id")
+	uid, _ := strconv.Atoi(id)
+	user := new(service.UserService).DescribeUserById(uint(uid))
+	if user.ID == 0 {
+		c.JSON(http.StatusNotFound, gin.H{
+			"code":    http.StatusNotFound,
+			"message": "user not found",
+		})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{
+		"code":    http.StatusOK,
+		"message": "success",
+		"data":    user,
+	})
+}
+
+func CreateUser(c *gin.Context) {
+	var userDTO dto.UserDTO
+	// 绑定一个请求主体到一个类型
+	_ = c.BindJSON(&userDTO)
+	new(service.UserService).Save(&userDTO)
+	c.JSON(http.StatusOK, gin.H{
+		"code":    http.StatusOK,
+		"message": "success",
+	})
+}
+
+func ModifyUserById(c *gin.Context) {
+	id := c.Params.ByName("id")
+	uid, _ := strconv.Atoi(id)
+	localUser := new(service.UserService).DescribeUserById(uint(uid))
+	if localUser.ID == 0 {
+		c.JSON(http.StatusNotFound, gin.H{
+			"code":    http.StatusNotFound,
+			"message": "user not found",
+		})
+		return
+	} else {
+		var userDTO dto.UserDTO
+		_ = c.BindJSON(&userDTO)
+		new(service.UserService).ModifyById(&userDTO)
+		c.JSON(http.StatusOK, gin.H{
+			"code":    http.StatusOK,
+			"message": "success",
+		})
+	}
+}
+
+func DeleteUserById(c *gin.Context) {
+	id := c.Params.ByName("id")
+	uid, _ := strconv.Atoi(id)
+	localUser := new(service.UserService).DescribeUserById(uint(uid))
+	if localUser.ID == 0 {
+		c.JSON(http.StatusNotFound, gin.H{
+			"code":    http.StatusNotFound,
+			"message": "user not found",
+		})
+		return
+	} else {
+		new(service.UserService).RemoveById(uint(uid))
+		c.JSON(http.StatusOK, gin.H{
+			"code":    http.StatusOK,
+			"message": "success",
+		})
+	}
+}
diff --git a/src/rest/urls.go b/src/rest/urls.go
index 00f6f9d..85199ec 100644
--- a/src/rest/urls.go
+++ b/src/rest/urls.go
@@ -2,7 +2,7 @@ package rest
 
 import (
 	"github.com/gin-gonic/gin"
-	v3 "lingye-gin/src/rest/api"
+	"lingye-gin/src/rest/api"
 	v1 "lingye-gin/src/rest/v1"
 	v2 "lingye-gin/src/rest/v2"
 	"lingye-gin/src/util"
@@ -39,5 +39,14 @@ var Urls = [...]RequestApi{
 	// v2
 	{GroupName: "v2", GroupHandleFunction: util.VerifySign, Mode: "get", RelativePath: "/students", HandleFunction: v2.DescribeStudents},
 	// api jwt
-	{GroupName: "api", Mode: "get", RelativePath: "/students", HandleFunction: v3.DescribeStudents},
+	// 获取所有用户
+	{GroupName: "api", Mode: "get", RelativePath: "/users", HandleFunction: api.DescribeUsers},
+	// 根据ID获取用户
+	{GroupName: "api", Mode: "get", RelativePath: "/users/:id", HandleFunction: api.DescribeUserById},
+	// 保存用户
+	{GroupName: "api", Mode: "post", RelativePath: "/users", HandleFunction: api.CreateUser},
+	// 根据ID更新用户
+	{GroupName: "api", Mode: "put", RelativePath: "/users/:id", HandleFunction: api.ModifyUserById},
+	// 根据ID删除用户
+	{GroupName: "api", Mode: "delete", RelativePath: "/users/:id", HandleFunction: api.DeleteUserById},
 }
diff --git a/src/service/dto/user_dto.go b/src/service/dto/user_dto.go
index c121cad..e36bdac 100644
--- a/src/service/dto/user_dto.go
+++ b/src/service/dto/user_dto.go
@@ -3,6 +3,8 @@ package dto
 import "lingye-gin/src/base"
 
 type UserDTO struct {
-	base.SimplePage
-	Username string
+	base.LingYeDTO
+	UserName string `json:"username" form:"username"`
+	Email    string `json:"email" form:"email"`
+	Password string `json:"password" form:"password"`
 }
diff --git a/src/service/query/user_query.go b/src/service/query/user_query.go
new file mode 100644
index 0000000..3603c20
--- /dev/null
+++ b/src/service/query/user_query.go
@@ -0,0 +1,8 @@
+package query
+
+import "lingye-gin/src/base"
+
+type UserQuery struct {
+	base.SimplePage
+	Username string `json:"username"`
+}
diff --git a/src/service/user_service.go b/src/service/user_service.go
new file mode 100644
index 0000000..b60af9e
--- /dev/null
+++ b/src/service/user_service.go
@@ -0,0 +1,44 @@
+package service
+
+import (
+	"lingye-gin/src/dao"
+	"lingye-gin/src/entity"
+	"lingye-gin/src/service/dto"
+	"lingye-gin/src/service/query"
+	"lingye-gin/src/util"
+)
+
+type UserService struct{}
+
+func (UserService) Save(resource *dto.UserDTO) {
+	if resource.ID != 0 {
+		panic("id is not zero")
+	}
+	record := &entity.User{}
+	util.StructCopy(resource, record)
+	new(dao.UserDAO).Insert(record)
+}
+
+func (UserService) RemoveById(id uint) {
+	if id == 0 {
+		panic("id is zero")
+	}
+	new(dao.UserDAO).DeleteById(id)
+}
+
+func (UserService) ModifyById(resource *dto.UserDTO) {
+	if resource.ID == 0 {
+		panic("id is zero")
+	}
+	record := &entity.User{}
+	util.StructCopy(resource, record)
+	new(dao.UserDAO).UpdateById(record)
+}
+
+func (UserService) DescribeUsers(condition query.UserQuery) ([]entity.User, int) {
+	return new(dao.UserDAO).SelectPage(condition)
+}
+
+func (UserService) DescribeUserById(id uint) entity.User {
+	return new(dao.UserDAO).SelectOne(id)
+}