diff --git a/YLErpDAL/Modules/TradeModule/TradeApprovalOAService.cs b/YLErpDAL/Modules/TradeModule/TradeApprovalOAService.cs
index 1884fa2f..afd3e342 100644
--- a/YLErpDAL/Modules/TradeModule/TradeApprovalOAService.cs
+++ b/YLErpDAL/Modules/TradeModule/TradeApprovalOAService.cs
@@ -219,19 +219,20 @@ namespace YLErp.Modules.TradeModule
         {
             var messages = new List<string>();
             var staleAt = DateTime.Now.AddMinutes(-5);
+            var syncInstance = $"{Environment.MachineName}/pid:{Environment.ProcessId}/run:{Guid.NewGuid():N}";
             var pending = DbContext.tradeApprovalOaResult
                 .Where(x => x.is_valid
                     && !string.IsNullOrWhiteSpace(x.oa_fileid)
                     && (string.IsNullOrWhiteSpace(requestId) || x.oa_fileid == requestId)
                     && (x.status == Pending || (x.status == Syncing && (x.last_query_time == null || x.last_query_time < staleAt))))
                 .ToList();
-            _logger.Info($"开始轮询 OA 移动审批状态，requestId:{requestId ?? "全部"}，待查询数量:{pending.Count}");
+            _logger.Info($"开始轮询 OA 移动审批状态，requestId:{requestId ?? "全部"}，待查询数量:{pending.Count}，实例:{syncInstance}");
             foreach (var record in pending)
             {
                 var claimed = false;
                 try
                 {
-                    _logger.Info($"查询 OA 移动审批状态，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}");
+                    _logger.Info($"查询 OA 移动审批状态，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，本地状态:{record.status}，上次查询:{record.last_query_time:yyyy-MM-dd HH:mm:ss.fff}，实例:{syncInstance}");
                     var response = Query(record.oa_fileid);
                     record.last_response = response.ToString();
                     var flow = response["data"] is JArray data
@@ -254,18 +255,21 @@ namespace YLErp.Modules.TradeModule
                     _logger.Info($"OA 移动审批查询结果，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，flowStatusType:{flowStatusType}，flowNode:{flowNode}，判定:{(isReturned ? "退回" : isApproved ? "通过" : "等待")}");
                     if (!isApproved && !isReturned)
                     {
+                        _logger.Info($"OA 移动审批继续等待，不会推进本地流程，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，flowStatusType:{flowStatusType}，flowNode:{flowNode}，实例:{syncInstance}");
                         record.last_query_time = DateTime.Now;
                         DbContext.SaveChanges();
                         continue;
                     }
 
                     DbContext.SaveChanges();
+                    _logger.Info($"OA 审批结果满足回写条件，准备抢占同步记录，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，本地状态:{record.status}，实例:{syncInstance}");
                     if (!TryClaimForSync(record.id))
                     {
-                        _logger.Info($"OA 审批结果同步未抢占记录，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}");
+                        _logger.Info($"OA 审批结果同步未抢占记录，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，实例:{syncInstance}");
                         continue;
                     }
                     claimed = true;
+                    _logger.Info($"OA 审批结果已抢占记录并置为同步中，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，实例:{syncInstance}");
 
                     var trade = DbContext.trade.Find(record.trade_id);
                     if (trade == null)
@@ -289,12 +293,12 @@ namespace YLErp.Modules.TradeModule
                     if (!string.IsNullOrWhiteSpace(result.ErrorMsg))
                     {
                         SetClaimedStatus(record.id, Pending, result.ErrorMsg);
-                        _logger.Error($"OA 审批结果回写本地失败，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，原因:{result.ErrorMsg}");
+                        _logger.Error($"OA 审批结果回写本地失败，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，原因:{result.ErrorMsg}，实例:{syncInstance}");
                     }
                     else
                     {
                         SetClaimedStatus(record.id, isReturned ? "退回" : "通过", null);
-                        _logger.Info($"OA 审批结果回写本地成功，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，结果:{(isReturned ? "退回" : "通过")}");
+                        _logger.Info($"OA 审批结果回写本地成功，交易:{record.trade_id}，节点:{record.approval_process_id}，requestId:{record.oa_fileid}，结果:{(isReturned ? "退回" : "通过")}，实例:{syncInstance}");
                     }
                     messages.Add(record.trade_id + ":" + (string.IsNullOrWhiteSpace(result.ErrorMsg) ? (isReturned ? "退回" : "通过") : Pending));
                 }
@@ -313,7 +317,7 @@ namespace YLErp.Modules.TradeModule
                     _logger.Error($"轮询 OA 审批状态失败，requestId:{record.oa_fileid}", ex);
                 }
             }
-            _logger.Info($"OA 移动审批状态轮询结束，已处理数量:{messages.Count}");
+            _logger.Info($"OA 移动审批状态轮询结束，已处理数量:{messages.Count}，实例:{syncInstance}");
             return messages;
         }