diff --git a/README.md b/README.md
index 6f04c601e6fe149a103bcc264f5ec14403f916fc..b9a1b62b5fcaa47c0be31187d7bbbaf95b364b27 100644
--- a/README.md
+++ b/README.md
@@ -432,35 +432,56 @@ FOREIGN_KEY_CHECKS = 1;
 | resource | varchar(40) | 雪花算法随机UUID |
 | desc | varchar(200) | 功能描述 |
 | env | varchar(200) | 环境 |
+| create_time | datetime | 资源锁定时间 |
 
 - 加锁的实现如下，比较简单的实现，一般分布式锁实现都是使用Redis等
 
 ```java
-@Service public class LockServiceImpl implements LockService {
-
-    private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(LockServiceImpl.class);
-
-    @Resource private LockMapper lockMapper;
-
-    @Override public Long acquire(String key) {
-        try {
-            LockDO lockDO = new LockDO();
-            lockDO.setResource(key);
-            lockDO.setDesc(key);
-            lockDO.setEnv(EnvUtils.getEnv());
-            lockMapper.insert(lockDO);
-            return lockDO.getId();
-        } catch (DuplicateKeyException ex) {
-            LOGGER.warn("[LockService][acquire] lock acquire error:{}", ThrowableUtil.stackTraceToString(ex));
-        }
-        return null;
+@Service
+public class LockServiceImpl implements LockService {
+
+  private static final org.slf4j.Logger LOGGER  = LoggerFactory.getLogger(LockServiceImpl.class);
+
+  @Resource
+  private LockMapper                    lockMapper;
+
+  private static final int              TIMEOUT = 3000;
+
+  @Override
+  public Long acquire(String key) {
+    // 查询
+    String env = EnvUtils.getEnv();
+    LockDO oldLock = lockMapper.queryByResource(key, env);
+    if (oldLock != null) {
+      if (System.currentTimeMillis() - oldLock.getCreateTime().getTime() > TIMEOUT) {
+        release(key, oldLock.getId());
+      }
+      return null;
     }
 
-    @Override public boolean release(String key, Long lockId) {
-        return lockMapper.delete(lockId, key, EnvUtils.getEnv()) > 0;
+    try {
+      LockDO lockDO = new LockDO();
+      lockDO.setResource(key);
+      lockDO.setDesc(key);
+      lockDO.setEnv(env);
+      lockDO.setCreateTime(new Date());
+      lockMapper.insert(lockDO);
+      return lockDO.getId();
+    } catch (DuplicateKeyException ex) {
+      LOGGER.warn("[LockService][acquire][DuplicateKeyException] lock acquire error:{}", ThrowableUtil.stackTraceToString(ex));
+    } catch (Exception ex) {
+      LOGGER.warn("[LockService][acquire][Exception] lock acquire error:{}", ThrowableUtil.stackTraceToString(ex));
     }
+    return null;
+  }
+
+  @Override
+  public boolean release(String key, Long lockId) {
+    return lockMapper.delete(lockId, key, EnvUtils.getEnv()) > 0;
+  }
 }
 
+
 ```
 
 ## 项目界面
diff --git a/admin/admin-biz/src/main/java/cn/icanci/loopstack/ddk/admin/biz/service/impl/LockServiceImpl.java b/admin/admin-biz/src/main/java/cn/icanci/loopstack/ddk/admin/biz/service/impl/LockServiceImpl.java
index 13c5c277bddea6492a81d354e02a015902e85bd2..2765f10c029038daa865538648d6fa0ff6d34d3c 100644
--- a/admin/admin-biz/src/main/java/cn/icanci/loopstack/ddk/admin/biz/service/impl/LockServiceImpl.java
+++ b/admin/admin-biz/src/main/java/cn/icanci/loopstack/ddk/admin/biz/service/impl/LockServiceImpl.java
@@ -6,6 +6,8 @@ import cn.icanci.loopstack.ddk.admin.dal.mapper.entity.LockDO;
 import cn.icanci.loopstack.ddk.admin.dal.mapper.mapper.LockMapper;
 import io.netty.util.internal.ThrowableUtil;
 
+import java.util.Date;
+
 import javax.annotation.Resource;
 
 import org.slf4j.LoggerFactory;
@@ -19,22 +21,37 @@ import org.springframework.stereotype.Service;
 @Service
 public class LockServiceImpl implements LockService {
 
-    private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(LockServiceImpl.class);
+    private static final org.slf4j.Logger LOGGER  = LoggerFactory.getLogger(LockServiceImpl.class);
 
     @Resource
     private LockMapper                    lockMapper;
 
+    private static final int              TIMEOUT = 3000;
+
     @Override
     public Long acquire(String key) {
+        // 查询
+        String env = EnvUtils.getEnv();
+        LockDO oldLock = lockMapper.queryByResource(key, env);
+        if (oldLock != null) {
+            if (System.currentTimeMillis() - oldLock.getCreateTime().getTime() > TIMEOUT) {
+                release(key, oldLock.getId());
+            }
+            return null;
+        }
+
         try {
             LockDO lockDO = new LockDO();
             lockDO.setResource(key);
             lockDO.setDesc(key);
-            lockDO.setEnv(EnvUtils.getEnv());
+            lockDO.setEnv(env);
+            lockDO.setCreateTime(new Date());
             lockMapper.insert(lockDO);
             return lockDO.getId();
         } catch (DuplicateKeyException ex) {
-            LOGGER.warn("[LockService][acquire] lock acquire error:{}", ThrowableUtil.stackTraceToString(ex));
+            LOGGER.warn("[LockService][acquire][DuplicateKeyException] lock acquire error:{}", ThrowableUtil.stackTraceToString(ex));
+        } catch (Exception ex) {
+            LOGGER.warn("[LockService][acquire][Exception] lock acquire error:{}", ThrowableUtil.stackTraceToString(ex));
         }
         return null;
     }
diff --git a/admin/admin-dal/src/main/java/cn/icanci/loopstack/ddk/admin/dal/mapper/entity/LockDO.java b/admin/admin-dal/src/main/java/cn/icanci/loopstack/ddk/admin/dal/mapper/entity/LockDO.java
index 1c35034cd8669ea4c0bdecbbd3c8de679de0bfef..6e981d440d3468c1680725e5876d9c803645eade 100644
--- a/admin/admin-dal/src/main/java/cn/icanci/loopstack/ddk/admin/dal/mapper/entity/LockDO.java
+++ b/admin/admin-dal/src/main/java/cn/icanci/loopstack/ddk/admin/dal/mapper/entity/LockDO.java
@@ -2,8 +2,6 @@ package cn.icanci.loopstack.ddk.admin.dal.mapper.entity;
 
 import java.io.Serializable;
 import java.util.Date;
-import java.util.List;
-import java.math.BigDecimal;
 
 /**
 * DdkLock
@@ -31,6 +29,11 @@ public class LockDO implements Serializable {
      */
     private String desc;
 
+    /**
+     * createTime 创建时间
+     */
+    private Date createTime;
+
     /**
      * env  环境
      */
@@ -67,4 +70,12 @@ public class LockDO implements Serializable {
     public String getEnv() {
     return this.env;
     }
+
+    public Date getCreateTime() {
+        return createTime;
+    }
+
+    public void setCreateTime(Date createTime) {
+        this.createTime = createTime;
+    }
 }
\ No newline at end of file
diff --git a/admin/admin-dal/src/main/java/cn/icanci/loopstack/ddk/admin/dal/mapper/mapper/LockMapper.java b/admin/admin-dal/src/main/java/cn/icanci/loopstack/ddk/admin/dal/mapper/mapper/LockMapper.java
index 61be5ebdf3d8593d247f2d8dd90ebe45ace59ba0..b2ce0c811d3abcb8c0a6b92b7b8dbb86daa67d09 100644
--- a/admin/admin-dal/src/main/java/cn/icanci/loopstack/ddk/admin/dal/mapper/mapper/LockMapper.java
+++ b/admin/admin-dal/src/main/java/cn/icanci/loopstack/ddk/admin/dal/mapper/mapper/LockMapper.java
@@ -29,4 +29,6 @@ public interface LockMapper {
      * @param resource 资源
      **/
     int delete(@Param("key") Object key, @Param("resource") String resource, @Param("env") String env);
+
+    LockDO queryByResource(@Param("resource") String resource, @Param("env") String env);
 }
diff --git a/admin/admin-dal/src/main/resources/mybatis/mapper/LockMapper.xml b/admin/admin-dal/src/main/resources/mybatis/mapper/LockMapper.xml
index e0d170d6cd79c873f06480f937a28228ed2e5e2e..f0a8fc37328fda9f31f032814667200b173a5327 100644
--- a/admin/admin-dal/src/main/resources/mybatis/mapper/LockMapper.xml
+++ b/admin/admin-dal/src/main/resources/mybatis/mapper/LockMapper.xml
@@ -9,6 +9,7 @@
         <result column="resource" property="resource"/>
         <result column="desc" property="desc"/>
         <result column="env" property="env"/>
+        <result column="create_time" property="createTime"/>
     </resultMap>
 
     <sql id="Base_Column_List">
@@ -16,7 +17,8 @@
         ,
                 `resource`,
                 `desc`,
-                `env`
+                `env`,
+ `create_time`
     </sql>
 
     <!-- 插入数据 -->
@@ -60,5 +62,11 @@
           and `env` = #{env}
           and `resource` = #{resource}
     </delete>
+    <select id="queryByResource" resultType="cn.icanci.loopstack.ddk.admin.dal.mapper.entity.LockDO">
+        SELECT
+        <include refid="Base_Column_List"/>
+        FROM ddk_lock
+        WHERE `resource` = #{resource} and `env` = #{env}
+    </select>
 
 </mapper>
\ No newline at end of file