diff --git a/openhis-ui-vue3/src/views/doctorstation/components/diagnosis/infectiousDiseaseReportDialog.vue b/openhis-ui-vue3/src/views/doctorstation/components/diagnosis/infectiousDiseaseReportDialog.vue
index 647bfa928..837f2eb1c 100755
--- a/openhis-ui-vue3/src/views/doctorstation/components/diagnosis/infectiousDiseaseReportDialog.vue
+++ b/openhis-ui-vue3/src/views/doctorstation/components/diagnosis/infectiousDiseaseReportDialog.vue
@@ -548,6 +548,8 @@ const dialogReadOnly = ref(false);
 const formRef = ref(null);
 // 保存按钮加载状态，防止重复提交
 const submitLoading = ref(false);
+// 数据加载中标志，防止 showReport 加载已有数据时 watch 清空分型字段
+const loadingData = ref(false);
 
 const props = defineProps({
   title: {
@@ -940,7 +942,8 @@ const showSubtypeSelect = computed(() => {
 // 监听疾病选择变化，自动清空分型选择
 watch(() => [form.value.selectedClassA, form.value.selectedClassB, form.value.selectedClassC], (newVal, oldVal) => {
   // 如果疾病选择发生变化，清空分型选择
-  if (JSON.stringify(newVal) !== JSON.stringify(oldVal)) {
+  // 数据加载中时不清空，避免 showReport 加载已有数据时被错误清空
+  if (JSON.stringify(newVal) !== JSON.stringify(oldVal) && !loadingData.value) {
     form.value.diseaseType = '';
   }
 }, { deep: true });
@@ -1092,6 +1095,9 @@ function showReport(reportData = {}, readOnly = true) {
   dialogVisible.value = true;
   dialogReadOnly.value = readOnly;
 
+  // 标记数据加载中，防止 watch 清空 diseaseType 分型字段
+  loadingData.value = true;
+
   resetAddressSelector();
   initProvinceOptions();
 
@@ -1149,6 +1155,9 @@ function showReport(reportData = {}, readOnly = true) {
     form.value.addressCounty,
     form.value.addressTown
   );
+
+  // 数据加载完成，恢复 watch 监听
+  loadingData.value = false;
 }
 
 /**