diff --git a/main.go b/main.go
index 3e5860a..277319e 100644
--- a/main.go
+++ b/main.go
@@ -3,7 +3,7 @@ package main
 /*--------------------------------------------------------
                 定时任务调度
  	兼容Linux crontab时间格式语法，最小粒度可精确到每秒
- 	支持通过HTTP、SSH协议任务执行
+ 	支持通过HTTP、SSH协议执行任务
 --------------------------------------------------------*/
 
 import (
diff --git a/models/model.go b/models/model.go
index 5550d07..86f4227 100644
--- a/models/model.go
+++ b/models/model.go
@@ -8,6 +8,7 @@ import (
     "github.com/ouqiang/cron-scheduler/modules/setting"
     "gopkg.in/macaron.v1"
     "strings"
+    "time"
 )
 
 type Status int8
@@ -42,12 +43,14 @@ func CreateDb(configFile string) *xorm.Engine {
         mapper := core.NewPrefixMapper(core.SnakeMapper{}, config["prefix"])
         engine.SetTableMapper(mapper)
     }
-    // 本地环境开始日志
+    // 本地环境开启日志
     if macaron.Env == macaron.DEV {
         engine.ShowSQL(true)
         engine.Logger().SetLevel(core.LOG_DEBUG)
     }
 
+    go keepDbAlived(engine)
+
     return engine
 }
 
@@ -91,3 +94,12 @@ func getDbConfig(configFile string) map[string]string {
 
     return db
 }
+
+// 定时ping, 防止因数据库超时设置被断开
+func keepDbAlived(engine *xorm.Engine)  {
+    t := time.Tick(180 * time.Second)
+    for {
+        <- t
+        engine.Ping()
+    }
+}
\ No newline at end of file
diff --git a/routers/install/install.go b/routers/install/install.go
index 7cfa8cc..362a259 100644
--- a/routers/install/install.go
+++ b/routers/install/install.go
@@ -14,7 +14,7 @@ import (
 type InstallForm struct {
     DbType        string `binding:"IN(mysql)"`
     DbHost        string `binding:"Required"`
-    DbPort        int    `binding:"Required"`
+    DbPort        int    `binding:"Required"` // todo 限制端口范围1-65535, 为什么规则未生效？
     DbUsername    string `binding:"Required"`
     DbPassword    string `binding:"Required"`
     DbName        string `binding:"Required"`