diff --git a/src/server/game/log_mgr.go b/src/server/game/log_mgr.go
index 0f216af1..e333826d 100644
--- a/src/server/game/log_mgr.go
+++ b/src/server/game/log_mgr.go
@@ -197,6 +197,15 @@ func (L *LogMgr) InitManager() {
 }
 
 func (L *LogMgr) AddLog(logs *Log) {
+	// 复制结构体和 Param map，避免并发修改导致 json.Marshal 时 panic
+	copyLog := *logs
+	if logs.Param != nil {
+		newParam := make(map[string]interface{}, len(logs.Param))
+		for k, v := range logs.Param {
+			newParam[k] = v
+		}
+		copyLog.Param = newParam
+	}
 	// 如果已经开始关闭，直接丢弃
 	L.Lock.Lock()
 	if L.closing {