diff --git a/internal/room/room.go b/internal/room/room.go
index 3fcab93..3f189d2 100644
--- a/internal/room/room.go
+++ b/internal/room/room.go
@@ -87,9 +87,13 @@ type Room struct {
 	createdAt  int64            // 房间创建时间戳
 	lastActive int64            // 最近活跃时间戳（清理判定）
 	lastResult map[string]any   // 上一局结算信息（房间内展示）
+	inviteAt   map[int]int64    // 对好友最近一次邀请时间（userID → unix），冷却 60 秒
 	closed     bool             // 房间是否已关闭
 }
 
+// 同一好友再次邀请的最短间隔
+const inviteCooldown = 60 * time.Second
+
 // newRoom 构造房间：按游戏类型确定座位数，按配置构造 AI 实例
 func newRoom(code, game, mode, aiProvider, aiDifficulty string) *Room {
 	if aiProvider == "" {
@@ -544,6 +548,18 @@ func (r *Room) handleMessage(c *Client, msgType string, raw json.RawMessage) {
 				return
 			}
 		}
+		// 同一好友 60 秒内不可重复邀请
+		now := time.Now().Unix()
+		if r.inviteAt == nil {
+			r.inviteAt = map[int]int64{}
+		}
+		if last, ok := r.inviteAt[req.UserID]; ok {
+			left := int64(inviteCooldown.Seconds()) - (now - last)
+			if left > 0 {
+				c.pushError(fmt.Sprintf("请 %d 秒后再邀请该好友", left))
+				return
+			}
+		}
 		gameName := r.Game
 		var g model.Game
 		if err := database.DB.Where("code = ?", r.Game).First(&g).Error; err == nil && g.Name != "" {
@@ -563,7 +579,8 @@ func (r *Room) handleMessage(c *Client, msgType string, raw json.RawMessage) {
 				})
 			}
 		}
-		c.push("invite_sent", map[string]any{"user_id": req.UserID})
+		r.inviteAt[req.UserID] = now
+		c.push("invite_sent", map[string]any{"user_id": req.UserID, "cooldown": int(inviteCooldown.Seconds())})
 	case "chat":
 		var req struct {
 			Text string `json:"text"`