diff --git a/IRaCIS.Core.API/HostService/HangfireHostService.cs b/IRaCIS.Core.API/HostService/HangfireHostService.cs
index f1ede2c8b..478d883b9 100644
--- a/IRaCIS.Core.API/HostService/HangfireHostService.cs
+++ b/IRaCIS.Core.API/HostService/HangfireHostService.cs
@@ -41,6 +41,21 @@ public class HangfireHostService(IRecurringMessageScheduler _recurringMessageSch
             HangfireJobHelper.RemoveCronJob(jobId);
         }
 
+        // 清除所有可能存在的定时任务，防止类型加载错误
+        var allJobIdList = JobStorage.Current.GetConnection().GetRecurringJobs().Select(t => t.Id).ToList();
+        foreach (var jobId in allJobIdList)
+        {
+            try
+            {
+                HangfireJobHelper.RemoveCronJob(jobId);
+                _logger.LogInformation($"已清除定时任务: {jobId}");
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning($"清除定时任务 {jobId} 时出错: {ex.Message}");
+            }
+        }
+
 
         var taskInfoList = await _trialEmailNoticeConfigRepository.Where(t => t.Trial.TrialStatusStr == StaticData.TrialState.TrialOngoing && t.EmailCron != string.Empty && t.IsAutoSend)
               .Select(t => new { t.Id, t.Code, TrialCode = t.Trial.TrialCode, t.EmailCron, t.BusinessScenarioEnum, t.TrialId })
diff --git a/IRaCIS.Core.API/_ServiceExtensions/hangfireSetup.cs b/IRaCIS.Core.API/_ServiceExtensions/hangfireSetup.cs
index 1e2eff9eb..bd5456482 100644
--- a/IRaCIS.Core.API/_ServiceExtensions/hangfireSetup.cs
+++ b/IRaCIS.Core.API/_ServiceExtensions/hangfireSetup.cs
@@ -27,7 +27,8 @@ namespace IRaCIS.Core.API
                     hangFireConfig.UseSqlServerStorage(hangFireConnStr, new SqlServerStorageOptions()
                     {
                         SchemaName = "dbo",
-                    }).UseRecommendedSerializerSettings().UseSimpleAssemblyNameTypeSerializer();
+                    }).UseRecommendedSerializerSettings();
+                    // 移除 UseSimpleAssemblyNameTypeSerializer() 以避免类型加载问题
                 }