diff --git a/luoo_user/src/main/java/com/luoo/user/dao/AppUpdateDao.java b/luoo_user/src/main/java/com/luoo/user/dao/AppUpdateDao.java
index a979a2d..d86778c 100644
--- a/luoo_user/src/main/java/com/luoo/user/dao/AppUpdateDao.java
+++ b/luoo_user/src/main/java/com/luoo/user/dao/AppUpdateDao.java
@@ -1,11 +1,43 @@
 package com.luoo.user.dao;
 
+import com.luoo.user.pojo.AppUpdate;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Sort;
+import org.springframework.data.jpa.domain.Specification;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
 
-import com.luoo.user.pojo.AppUpdate;
+import javax.persistence.criteria.Expression;
+import javax.persistence.criteria.Predicate;
+import java.util.ArrayList;
+import java.util.List;
 
 public interface AppUpdateDao extends JpaRepository<AppUpdate, String>, JpaSpecificationExecutor<AppUpdate> {
 
-	//AppUpdate selectLatestUpdate(String appVersion, String deviceId);
+	default AppUpdate selectLatestUpdate(String appVersion, String deviceId){
+        Specification<AppUpdate> appUpdateSpecification = createAppUpdateSpecification(appVersion, deviceId);
+        Sort createTimeDescSort = Sort.by(Sort.Direction.DESC, "createTime");
+        Page<AppUpdate> appUpdatePage = this.findAll(appUpdateSpecification, PageRequest.of(0, 1, createTimeDescSort));
+        if(appUpdatePage.getContent().isEmpty()){
+            return null;
+        }
+        return appUpdatePage.getContent().get(0);
+    }
+
+    default Specification<AppUpdate> createAppUpdateSpecification(String appVersion, String deviceId) {
+        return (root, criteriaQuery, criteriaBuilder) -> {
+            List<Predicate> predicateList = new ArrayList<>();
+            predicateList.add(criteriaBuilder.greaterThan(root.get("version"), appVersion));
+            Predicate allPublishPredicate = criteriaBuilder.equal(root.get("status"), 2);
+            Predicate grayPublishPredicate = criteriaBuilder.equal(root.get("status"), 1);
+            Expression<Integer> grayDeviceExpress = criteriaBuilder
+                    .function("find_in_set", Integer.class, criteriaBuilder.literal(deviceId), root.get("grayscaleDevice"));
+            Predicate grayDevicePredicate = criteriaBuilder.gt(grayDeviceExpress, 0);
+            Predicate grayScalePredicate = criteriaBuilder.and(grayPublishPredicate, grayDevicePredicate);
+            predicateList.add(criteriaBuilder.or(allPublishPredicate, grayScalePredicate));
+            Predicate[] predicates = new Predicate[predicateList.size()];
+            return criteriaBuilder.and(predicateList.toArray(predicates));
+        };
+    }
 }
diff --git a/luoo_user/src/main/java/com/luoo/user/pojo/AppUpdate.java b/luoo_user/src/main/java/com/luoo/user/pojo/AppUpdate.java
index 87d328c..946d028 100644
--- a/luoo_user/src/main/java/com/luoo/user/pojo/AppUpdate.java
+++ b/luoo_user/src/main/java/com/luoo/user/pojo/AppUpdate.java
@@ -11,9 +11,7 @@ import org.springframework.format.annotation.DateTimeFormat;
 import java.io.Serializable;
 import java.util.Date;
 
-import javax.persistence.Entity;
-import javax.persistence.Id;
-import javax.persistence.Table;
+import javax.persistence.*;
 
 
 @Entity
@@ -58,6 +56,7 @@ public class AppUpdate implements Serializable {
      */
     private String grayscaleDevice;
 
+    @Transient
     private String[] updateDescArray;
 
     public String[] getUpdateDescArray() {
diff --git a/luoo_user/src/main/java/com/luoo/user/service/AppUpdateService.java b/luoo_user/src/main/java/com/luoo/user/service/AppUpdateService.java
index a9a87d4..26f27a6 100644
--- a/luoo_user/src/main/java/com/luoo/user/service/AppUpdateService.java
+++ b/luoo_user/src/main/java/com/luoo/user/service/AppUpdateService.java
@@ -151,7 +151,6 @@ public class AppUpdateService {
 			 */
 
 	public AppUpdate getLatestUpdate(String appVersion, String deviceId) {
-		//return appUpdateDao.selectLatestUpdate(appVersion, deviceId);
-		return null;
+		return appUpdateDao.selectLatestUpdate(appVersion, deviceId);
 	}
 }
diff --git a/luoo_user/src/main/resources/sql/domain.sql b/luoo_user/src/main/resources/sql/domain.sql
new file mode 100644
index 0000000..4943f3e
--- /dev/null
+++ b/luoo_user/src/main/resources/sql/domain.sql
@@ -0,0 +1,14 @@
+-- 创建表
+drop table if exists indie_user.tb_app_update;
+create table if not exists indie_user.tb_app_update (
+    id                varchar(100)                             not null comment 'ID' primary key,
+    version           varchar(10)    default ''                not null comment '版本号',
+    update_desc       varchar(500)   default ''                not null comment '更新描述',
+    update_type       tinyint(1)     default 0                 not null comment '更新类型(0=全更新, 1=局部热更新)',
+    status            tinyint(1)     default 1                 not null comment '状态(0=未发布, 1=灰度发布, 2=全网发布)',
+    grayscale_device  varchar(4000)  default ''                not null comment '灰度设备ID集合(英文逗号相隔)',
+    create_time       datetime       default CURRENT_TIMESTAMP not null comment '创建时间'
+) comment '应用版本更新记录表';
+
+create index idx_version on indie_user.tb_app_update (version);
+create index idx_create_time on indie_user.tb_app_update (create_time);
\ No newline at end of file