diff --git a/Unity/Assets/Scripts/TH1_Logic/CrashSight/CrashSightManager.cs b/Unity/Assets/Scripts/TH1_Logic/CrashSight/CrashSightManager.cs
index 03c239576..6b9314a86 100644
--- a/Unity/Assets/Scripts/TH1_Logic/CrashSight/CrashSightManager.cs
+++ b/Unity/Assets/Scripts/TH1_Logic/CrashSight/CrashSightManager.cs
@@ -17,6 +17,7 @@ namespace Logic.CrashSight
         public static CrashSightManager Instance => new CrashSightManager();
         private const string CrashSightDeviceIdFallbackKey = "TH1_CrashSightDeviceId";
         private static string _runtimeFallbackDeviceId;
+        private static ulong _reportedSteamUserId;
         private CrashSightManager() { }
         
         public void Initialize()
@@ -31,6 +32,24 @@ namespace Logic.CrashSight
             CrashSightAgent.SetUserValue("DeviceId", deviceId);
         }
 
+        public static void UpdateSteamUserId(ulong steamUserId)
+        {
+            if (steamUserId == 0 || !CrashSightAgent.IsInitialized || _reportedSteamUserId == steamUserId) return;
+
+            try
+            {
+                var value = steamUserId.ToString();
+                CrashSightAgent.SetUserId(value);
+                CrashSightAgent.SetUserValue("SteamId", value);
+                CrashSightAgent.SetUserValue("MemberId", value);
+                _reportedSteamUserId = steamUserId;
+            }
+            catch (System.Exception e)
+            {
+                Debug.LogWarning($"CrashSight SetSteamUserId failed: {e.Message}");
+            }
+        }
+
         public static string GetCrashSightDeviceId()
         {
             try
diff --git a/Unity/Assets/Scripts/TH1_Logic/Steam/SteamLobbyManager.cs b/Unity/Assets/Scripts/TH1_Logic/Steam/SteamLobbyManager.cs
index dbcf5cf69..22d7fbac9 100644
--- a/Unity/Assets/Scripts/TH1_Logic/Steam/SteamLobbyManager.cs
+++ b/Unity/Assets/Scripts/TH1_Logic/Steam/SteamLobbyManager.cs
@@ -371,6 +371,7 @@ namespace TH1_Logic.Steam
             {
                 if (!TrySteamApi("RefreshLoginStatus.GetSteamID", SteamUser.GetSteamID, out _selfID)) return;
                 if (!TrySteamApi("RefreshLoginStatus.GetPersonaName", SteamFriends.GetPersonaName, out _selfName)) return;
+                CrashSightManager.UpdateSteamUserId(_selfID.m_SteamID);
                 LogSystem.LogInfo($"Steam用户已登录: {_selfName} ({_selfID})");
             }
             else