diff --git a/actions/comment.go b/actions/comment.go
index a4eecea..e05ee65 100644
--- a/actions/comment.go
+++ b/actions/comment.go
@@ -45,7 +45,7 @@ func PostComment(c *gin.Context) {
 	m := c.PostForm("email")
 	comment := c.PostForm("comment")
 	c.Request.Body = io.NopCloser(bytes.NewBuffer(data))
-	req, err := http.NewRequest("POST", config.Conf.PostCommentUrl, strings.NewReader(c.Request.PostForm.Encode()))
+	req, err := http.NewRequest("POST", config.Conf.Load().PostCommentUrl, strings.NewReader(c.Request.PostForm.Encode()))
 	if err != nil {
 		return
 	}
@@ -70,7 +70,7 @@ func PostComment(c *gin.Context) {
 			err = er
 			return
 		}
-		cu, er := url.Parse(config.Conf.PostCommentUrl)
+		cu, er := url.Parse(config.Conf.Load().PostCommentUrl)
 		if er != nil {
 			err = er
 			return
@@ -104,8 +104,8 @@ func PostComment(c *gin.Context) {
 				return
 			}
 			su := fmt.Sprintf("%s: %s[%s]发表了评论对文档[%v]的评论", config.Options.Value("siteurl"), author, m, post.PostTitle)
-			err = mail.SendMail([]string{config.Conf.Mail.User}, su, comment)
-			logs.ErrPrintln(err, "发送邮件", config.Conf.Mail.User, su, comment)
+			err = mail.SendMail([]string{config.Conf.Load().Mail.User}, su, comment)
+			logs.ErrPrintln(err, "发送邮件", config.Conf.Load().Mail.User, su, comment)
 		}()
 
 		s, er := io.ReadAll(ress.Body)
diff --git a/actions/common/common.go b/actions/common/common.go
index 48b208c..03a8ae0 100644
--- a/actions/common/common.go
+++ b/actions/common/common.go
@@ -28,34 +28,35 @@ var usersCache *cache.MapCache[uint64, wp.Users]
 var commentsCache *cache.MapCache[uint64, wp.Comments]
 
 func InitActionsCommonCache() {
+	c := config.Conf.Load()
 	archivesCaches = &Arch{
 		mutex:        &sync.Mutex{},
 		setCacheFunc: archives,
 	}
 
-	searchPostIdsCache = cache.NewMapCacheByFn[string, PostIds](searchPostIds, config.Conf.SearchPostCacheTime)
+	searchPostIdsCache = cache.NewMapCacheByFn[string, PostIds](searchPostIds, c.SearchPostCacheTime)
 
-	postListIdsCache = cache.NewMapCacheByFn[string, PostIds](searchPostIds, config.Conf.PostListCacheTime)
+	postListIdsCache = cache.NewMapCacheByFn[string, PostIds](searchPostIds, c.PostListCacheTime)
 
-	monthPostsCache = cache.NewMapCacheByFn[string, []uint64](monthPost, config.Conf.MonthPostCacheTime)
+	monthPostsCache = cache.NewMapCacheByFn[string, []uint64](monthPost, c.MonthPostCacheTime)
 
-	postContextCache = cache.NewMapCacheByFn[uint64, PostContext](getPostContext, config.Conf.ContextPostCacheTime)
+	postContextCache = cache.NewMapCacheByFn[uint64, PostContext](getPostContext, c.ContextPostCacheTime)
 
-	postsCache = cache.NewMapCacheByBatchFn[uint64, wp.Posts](getPostsByIds, config.Conf.PostDataCacheTime)
+	postsCache = cache.NewMapCacheByBatchFn[uint64, wp.Posts](getPostsByIds, c.PostDataCacheTime)
 
-	categoryCaches = cache.NewSliceCache[wp.WpTermsMy](categories, config.Conf.CategoryCacheTime)
+	categoryCaches = cache.NewSliceCache[wp.WpTermsMy](categories, c.CategoryCacheTime)
 
-	recentPostsCaches = cache.NewSliceCache[wp.Posts](recentPosts, config.Conf.RecentPostCacheTime)
+	recentPostsCaches = cache.NewSliceCache[wp.Posts](recentPosts, c.RecentPostCacheTime)
 
-	recentCommentsCaches = cache.NewSliceCache[wp.Comments](recentComments, config.Conf.RecentCommentsCacheTime)
+	recentCommentsCaches = cache.NewSliceCache[wp.Comments](recentComments, c.RecentCommentsCacheTime)
 
-	postCommentCaches = cache.NewMapCacheByFn[uint64, []uint64](postComments, config.Conf.PostCommentsCacheTime)
+	postCommentCaches = cache.NewMapCacheByFn[uint64, []uint64](postComments, c.PostCommentsCacheTime)
 
-	maxPostIdCache = cache.NewSliceCache[uint64](getMaxPostId, config.Conf.MaxPostIdCacheTime)
+	maxPostIdCache = cache.NewSliceCache[uint64](getMaxPostId, c.MaxPostIdCacheTime)
 
-	usersCache = cache.NewMapCacheByBatchFn[uint64, wp.Users](getUsers, config.Conf.UserInfoCacheTime)
+	usersCache = cache.NewMapCacheByBatchFn[uint64, wp.Users](getUsers, c.UserInfoCacheTime)
 
-	commentsCache = cache.NewMapCacheByBatchFn[uint64, wp.Comments](getCommentByIds, config.Conf.CommentsCacheTime)
+	commentsCache = cache.NewMapCacheByBatchFn[uint64, wp.Comments](getCommentByIds, c.CommentsCacheTime)
 }
 
 func ClearCache() {
@@ -68,6 +69,16 @@ func ClearCache() {
 	usersCache.ClearExpired()
 	commentsCache.ClearExpired()
 }
+func FlushCache() {
+	searchPostIdsCache.Flush()
+	postsCache.Flush()
+	postsCache.Flush()
+	postListIdsCache.Flush()
+	monthPostsCache.Flush()
+	postContextCache.Flush()
+	usersCache.Flush()
+	commentsCache.Flush()
+}
 
 type PostIds struct {
 	Ids    []uint64
diff --git a/actions/feed.go b/actions/feed.go
index 1583f5e..e8c9752 100644
--- a/actions/feed.go
+++ b/actions/feed.go
@@ -41,6 +41,10 @@ func ClearCache() {
 	postFeedCache.ClearExpired()
 	commentCache.ClearExpired()
 }
+func FlushCache() {
+	postFeedCache.Flush()
+	commentCache.Flush()
+}
 
 func isCacheExpired(c *gin.Context, lastTime time.Time) bool {
 	eTag := helper.StringMd5(lastTime.Format(tmp))
diff --git a/config/config.go b/config/config.go
index db6bf49..e80df84 100644
--- a/config/config.go
+++ b/config/config.go
@@ -2,12 +2,13 @@ package config
 
 import (
 	"fmt"
+	"github/fthvgb1/wp-go/safety"
 	"gopkg.in/yaml.v2"
 	"os"
 	"time"
 )
 
-var Conf Config
+var Conf safety.Var[Config]
 
 type Config struct {
 	Mysql                   Mysql           `yaml:"mysql"`
@@ -61,10 +62,12 @@ func InitConfig(conf string) error {
 	if err != nil {
 		return err
 	}
-	err = yaml.Unmarshal(file, &Conf)
+	var c Config
+	err = yaml.Unmarshal(file, &c)
 	if err != nil {
 		return err
 	}
+	Conf.Store(c)
 	return nil
 }
 
@@ -77,7 +80,7 @@ type Dsn struct {
 	Charset  string `yaml:"charset"`
 }
 
-func (m *Dsn) GetDsn() string {
+func (m Dsn) GetDsn() string {
 	if m.Charset == "" {
 		m.Charset = "utf8"
 	}
diff --git a/db/db.go b/db/db.go
index 2ec2f6c..43c3451 100644
--- a/db/db.go
+++ b/db/db.go
@@ -35,23 +35,24 @@ func (r SqlxDb) Get(ctx context.Context, dest any, sql string, params ...any) er
 }
 
 func InitDb() error {
-	dsn := config.Conf.Mysql.Dsn.GetDsn()
+	c := config.Conf.Load()
+	dsn := c.Mysql.Dsn.GetDsn()
 	var err error
 	Db, err = sqlx.Open("mysql", dsn)
 	if err != nil {
 		return err
 	}
-	if config.Conf.Mysql.Pool.ConnMaxIdleTime != 0 {
-		Db.SetConnMaxIdleTime(config.Conf.Mysql.Pool.ConnMaxLifetime)
+	if c.Mysql.Pool.ConnMaxIdleTime != 0 {
+		Db.SetConnMaxIdleTime(c.Mysql.Pool.ConnMaxLifetime)
 	}
-	if config.Conf.Mysql.Pool.MaxIdleConn != 0 {
-		Db.SetMaxIdleConns(config.Conf.Mysql.Pool.MaxIdleConn)
+	if c.Mysql.Pool.MaxIdleConn != 0 {
+		Db.SetMaxIdleConns(c.Mysql.Pool.MaxIdleConn)
 	}
-	if config.Conf.Mysql.Pool.MaxOpenConn != 0 {
-		Db.SetMaxOpenConns(config.Conf.Mysql.Pool.MaxOpenConn)
+	if c.Mysql.Pool.MaxOpenConn != 0 {
+		Db.SetMaxOpenConns(c.Mysql.Pool.MaxOpenConn)
 	}
-	if config.Conf.Mysql.Pool.ConnMaxLifetime != 0 {
-		Db.SetConnMaxLifetime(config.Conf.Mysql.Pool.ConnMaxLifetime)
+	if c.Mysql.Pool.ConnMaxLifetime != 0 {
+		Db.SetConnMaxLifetime(c.Mysql.Pool.ConnMaxLifetime)
 	}
 	return err
 }
diff --git a/mail/mail.go b/mail/mail.go
index f86a3ea..25ac561 100644
--- a/mail/mail.go
+++ b/mail/mail.go
@@ -23,9 +23,10 @@ func SendMail(mailTo []string, subject string, body string, a ...AttacheFile) er
 	m := gomail.NewMessage(
 		gomail.SetEncoding(gomail.Base64),
 	)
+	c := config.Conf.Load()
 	m.SetHeader("From",
-		m.FormatAddress(config.Conf.Mail.User,
-			config.Conf.Mail.Alias,
+		m.FormatAddress(c.Mail.User,
+			c.Mail.Alias,
 		))
 	m.SetHeader("To", mailTo...)
 	m.SetHeader("Subject", subject)
@@ -43,12 +44,12 @@ func SendMail(mailTo []string, subject string, body string, a ...AttacheFile) er
 	}
 
 	d := gomail.NewDialer(
-		config.Conf.Mail.Host,
-		config.Conf.Mail.Port,
-		config.Conf.Mail.User,
-		config.Conf.Mail.Pass,
+		c.Mail.Host,
+		c.Mail.Port,
+		c.Mail.User,
+		c.Mail.Pass,
 	)
-	if config.Conf.Mail.Ssl {
+	if c.Mail.Ssl {
 		d.TLSConfig = &tls.Config{InsecureSkipVerify: true}
 	}
 	err := d.DialAndSend(m)
diff --git a/main.go b/main.go
index 4971c30..4568ab4 100644
--- a/main.go
+++ b/main.go
@@ -2,14 +2,20 @@ package main
 
 import (
 	"flag"
+	"fmt"
 	"github/fthvgb1/wp-go/actions"
 	"github/fthvgb1/wp-go/actions/common"
 	"github/fthvgb1/wp-go/config"
 	"github/fthvgb1/wp-go/db"
+	"github/fthvgb1/wp-go/mail"
 	"github/fthvgb1/wp-go/models"
 	"github/fthvgb1/wp-go/plugins"
 	"github/fthvgb1/wp-go/route"
+	"log"
 	"math/rand"
+	"os"
+	"os/signal"
+	"syscall"
 	"time"
 )
 
@@ -43,7 +49,7 @@ func init() {
 }
 
 func cronClearCache() {
-	t := time.NewTicker(config.Conf.CrontabClearCacheTime)
+	t := time.NewTicker(config.Conf.Load().CrontabClearCacheTime)
 	for {
 		select {
 		case <-t.C:
@@ -54,11 +60,38 @@ func cronClearCache() {
 	}
 }
 
-func main() {
-	if config.Conf.Port == "" {
-		config.Conf.Port = "80"
+func signalNotify() {
+	c := make(chan os.Signal)
+	signal.Notify(c, syscall.SIGUSR1, syscall.SIGUSR2)
+	conf := config.Conf.Load()
+	for {
+		switch <-c {
+		case syscall.SIGUSR1:
+		//todo 更新配置
+		case syscall.SIGUSR2:
+			go func() {
+				defer func() {
+					if r := recover(); r != nil {
+						mail.SendMail([]string{conf.Mail.User}, "清空缓存失败", fmt.Sprintf("err:[%s]", r))
+					}
+				}()
+				common.FlushCache()
+				plugins.FlushCache()
+				actions.FlushCache()
+				log.Println("清除缓存成功")
+			}()
+		}
 	}
-	err := route.SetupRouter().Run(config.Conf.Port)
+}
+
+func main() {
+	c := config.Conf.Load()
+	if c.Port == "" {
+		c.Port = "80"
+		config.Conf.Store(c)
+	}
+	go signalNotify()
+	err := route.SetupRouter().Run(c.Port)
 	if err != nil {
 		panic(err)
 	}
diff --git a/middleware/sendmail.go b/middleware/sendmail.go
index 2549bc5..6d4fabe 100644
--- a/middleware/sendmail.go
+++ b/middleware/sendmail.go
@@ -41,7 +41,7 @@ func RecoverAndSendMail(w io.Writer) func(ctx *gin.Context) {
 			)
 
 			er := mail.SendMail(
-				[]string{config.Conf.Mail.User},
+				[]string{config.Conf.Load().Mail.User},
 				fmt.Sprintf("%s%s %s 发生错误", fmt.Sprintf(config.Options.Value("siteurl")), c.FullPath(), time.Now().Format(time.RFC1123Z)), content)
 
 			if er != nil {
diff --git a/middleware/validateservername.go b/middleware/validateservername.go
index ad986d2..d28be43 100644
--- a/middleware/validateservername.go
+++ b/middleware/validateservername.go
@@ -9,7 +9,7 @@ import (
 )
 
 func ValidateServerNames() func(ctx *gin.Context) {
-	serverName := helper.SimpleSliceToMap(config.Conf.TrustServerNames, func(v string) string {
+	serverName := helper.SimpleSliceToMap(config.Conf.Load().TrustServerNames, func(v string) string {
 		return v
 	})
 	return func(c *gin.Context) {
diff --git a/plugins/digest.go b/plugins/digest.go
index 77f99f9..83ef8da 100644
--- a/plugins/digest.go
+++ b/plugins/digest.go
@@ -19,17 +19,20 @@ var digestCache *cache.MapCache[uint64, string]
 var quto = regexp.MustCompile(`&quot; *|&amp; *|&lt; *|&gt; ?|&nbsp; *`)
 
 func InitDigestCache() {
-	digestCache = cache.NewMapCacheByFn[uint64](digestRaw, config.Conf.DigestCacheTime)
+	digestCache = cache.NewMapCacheByFn[uint64](digestRaw, config.Conf.Load().DigestCacheTime)
 }
 
 func ClearDigestCache() {
 	digestCache.ClearExpired()
 }
+func FlushCache() {
+	digestCache.Flush()
+}
 
 func digestRaw(arg ...any) (string, error) {
 	str := arg[0].(string)
 	id := arg[1].(uint64)
-	limit := config.Conf.DigestWordCount
+	limit := config.Conf.Load().DigestWordCount
 	if limit < 0 {
 		return str, nil
 	} else if limit == 0 {
diff --git a/route/route.go b/route/route.go
index cb67360..a3a78ed 100644
--- a/route/route.go
+++ b/route/route.go
@@ -20,8 +20,9 @@ func SetupRouter() *gin.Engine {
 	// Disable Console Color
 	// gin.DisableConsoleColor()
 	r := gin.New()
-	if len(config.Conf.TrustIps) > 0 {
-		err := r.SetTrustedProxies(config.Conf.TrustIps)
+	c := config.Conf.Load()
+	if len(c.TrustIps) > 0 {
+		err := r.SetTrustedProxies(c.TrustIps)
 		if err != nil {
 			panic(err)
 		}
@@ -42,11 +43,11 @@ func SetupRouter() *gin.Engine {
 		gin.Logger(),
 		middleware.ValidateServerNames(),
 		middleware.RecoverAndSendMail(gin.DefaultErrorWriter),
-		middleware.FlowLimit(config.Conf.MaxRequestSleepNum, config.Conf.MaxRequestNum, config.Conf.SleepTime),
+		middleware.FlowLimit(c.MaxRequestSleepNum, c.MaxRequestNum, c.SleepTime),
 		middleware.SetStaticFileCache,
 	)
 	//gzip 因为一般会用nginx做反代时自动使用gzip,所以go这边本身可以不用
-	if config.Conf.Gzip {
+	if c.Gzip {
 		r.Use(gzip.Gzip(gzip.DefaultCompression, gzip.WithExcludedPaths([]string{
 			"/wp-includes/", "/wp-content/",
 		})))
@@ -60,7 +61,7 @@ func SetupRouter() *gin.Engine {
 	}))
 	store := cookie.NewStore([]byte("secret"))
 	r.Use(sessions.Sessions("go-wp", store))
-	r.GET("/", middleware.SearchLimit(config.Conf.SingleIpSearchNum), actions.Index)
+	r.GET("/", middleware.SearchLimit(c.SingleIpSearchNum), actions.Index)
 	r.GET("/page/:page", actions.Index)
 	r.GET("/p/category/:category", actions.Index)
 	r.GET("/p/category/:category/page/:page", actions.Index)
@@ -73,7 +74,7 @@ func SetupRouter() *gin.Engine {
 	r.GET("/p/:id/feed", actions.PostFeed)
 	r.GET("/feed", actions.Feed)
 	r.GET("/comments/feed", actions.CommentsFeed)
-	r.POST("/comment", middleware.FlowLimit(config.Conf.MaxRequestSleepNum, 5, config.Conf.SleepTime), actions.PostComment)
+	r.POST("/comment", middleware.FlowLimit(c.MaxRequestSleepNum, 5, c.SleepTime), actions.PostComment)
 	if gin.Mode() != gin.ReleaseMode {
 		pprof.Register(r, "dev/pprof")
 	}