diff --git a/src/service/disfection_ctl/disinfection_service.cpp b/src/service/disfection_ctl/disinfection_service.cpp
index e54c1cd..74bc58e 100644
--- a/src/service/disfection_ctl/disinfection_service.cpp
+++ b/src/service/disfection_ctl/disinfection_service.cpp
@@ -251,8 +251,11 @@ void DisinfectionService::pushDisinfectionPrinterTask() {  //
   task->complete_tp       = context.complete_tp;
   task->stateSnapshotList = context.stateSnapshotList;
   task->disinfectantUsage = context.beforeDisinfectantVolume_g - context.afterDisinfectantVolume_g;
-  task->disinfection_id   = context.id;
-  task->usr               = ds->getLoginUid();
+  if (task->disinfectantUsage < 0) {
+    task->disinfectantUsage = 0;
+  }
+  task->disinfection_id = context.id;
+  task->usr             = ds->getLoginUid();
 
   task->targetLog = cfg.targetLoglevel;
   task->actualLog = context.now_loglevel;