diff --git a/server/imserver/friendsmgr.go b/server/imserver/friendsmgr.go
index ea7dd58c..461054aa 100644
--- a/server/imserver/friendsmgr.go
+++ b/server/imserver/friendsmgr.go
@@ -7,13 +7,20 @@ import (
 	"mt"
 	"q5"
 	"strings"
+	"time"
 )
 
 type FriendsMgr struct {
 	cs.MsgHandlerImpl
-	users       map[string]*User
-	friendships map[string][]*Friendship
-	pendingReqs map[string]map[string]bool
+	users        map[string]*User
+	searchCaches map[string]SearchCache
+	friendships  map[string][]*Friendship
+	pendingReqs  map[string]map[string]bool
+}
+
+type SearchCache struct {
+	Users        []*User
+	LastModified time.Time
 }
 
 var gameDBStore *q5.Mysql
@@ -44,6 +51,7 @@ func (fm *FriendsMgr) init() {
 	fm.loadFriendshipsFromDB(friendDBStore)
 	// 加载等待验证好友请求 列表
 	fm.loadPendingRequestsFromDB(friendDBStore)
+	fm.searchCaches = make(map[string]SearchCache)
 }
 
 func (fm *FriendsMgr) unInit() {
@@ -52,8 +60,12 @@ func (fm *FriendsMgr) unInit() {
 }
 
 func (fm *FriendsMgr) searchFriends(searchKeyword string) []*User {
-	// By default, Search result save to caches..., key: search keyword, value: serial(search result),
-	// And,cache expired: 2days
+	if cachedResult, ok := fm.searchCaches[searchKeyword]; ok {
+		if time.Since(cachedResult.LastModified) <= 10*time.Hour {
+			return cachedResult.Users
+		}
+	}
+
 	listFriend := make([]*User, 10)
 	lowercaseQuery := strings.ToLower(searchKeyword)
 	for _, u := range fm.users {
@@ -65,6 +77,14 @@ func (fm *FriendsMgr) searchFriends(searchKeyword string) []*User {
 			listFriend = append(listFriend, uEntity)
 		}
 	}
+
+	// Add to caches
+	fm.searchCaches[searchKeyword] = SearchCache{
+		Users:        listFriend,
+		LastModified: time.Now(),
+	}
+	fm.clearExpiredCaches()
+
 	return listFriend
 }
 
@@ -230,6 +250,15 @@ func (fm *FriendsMgr) addFriendshipToMap(accountID string, friendship *Friendshi
 	}
 }
 
-func (fm *FriendsMgr) RegisterUser(accountId string, username string) {
+func (fm *FriendsMgr) registerUser(accountId string, username string) {
 	fm.users[accountId] = &User{AccountId: accountId, Username: username}
 }
+
+func (fm *FriendsMgr) clearExpiredCaches() {
+	expirationTime := time.Now().Add(-24 * time.Hour)
+	for key, entry := range fm.searchCaches {
+		if entry.LastModified.Before(expirationTime) {
+			delete(fm.searchCaches, key)
+		}
+	}
+}