diff --git a/src/views/contract/launch/components/ContractTemplateFillDemoModal.vue b/src/views/contract/launch/components/ContractTemplateFillDemoModal.vue
index 03907ca..16e0367 100644
--- a/src/views/contract/launch/components/ContractTemplateFillDemoModal.vue
+++ b/src/views/contract/launch/components/ContractTemplateFillDemoModal.vue
@@ -1,4 +1,4 @@
-<template>
+<template>
   <a-modal
     v-model:open="visible"
     :title="modalTitle"
@@ -709,6 +709,7 @@ watch(
     previewBlob.value = null;
     previewError.value = "";
     if (visible.value && creationMode.value === "template") {
+      prefillFromMainFields();
       nextTick(() => {
         schedulePreview();
       });
@@ -1126,12 +1127,55 @@ async function showModal(initialValues = {}, mode = "create") {
       ? copyContractFormData(initialValues.detailState)
       : copyContractFormData(initialValues);
 
+  // 预填充：从主合同同名字段自动取值填入模板变量
+  prefillFromMainFields(initialValues.detailState || initialValues);
+
   syncManualBodyFileList();
   previewBlob.value = null;
   previewError.value = "";
   visible.value = true;
 }
 
+function prefillFromMainFields(rawSource) {
+  if (!contractDetailState.value) return;
+  const values = { ...(contractDetailState.value.templateFieldValues || {}) };
+  const mappings = (activeTemplate.value?.variableMappings || []);
+  if (!mappings.length && !templateFieldList.value.length) return;
+  
+  const keysToFill = new Set();
+  mappings.forEach(item => {
+    const key = item.bindField || item.variableKey;
+    if (key) keysToFill.add(key);
+  });
+  // 也兜底检查字典中所有变量
+  templateFieldList.value.forEach(item => {
+    if (item.value) keysToFill.add(item.value);
+  });
+
+  let changed = false;
+  keysToFill.forEach(key => {
+    if (values[key] !== undefined && values[key] !== null && values[key] !== "") return;
+    // 1. 先尝试从当前合同详情直接取（同名字段）
+    let srcVal = contractDetailState.value[key];
+    // 2. 如果没取到，再尝试从原始数据中取
+    if ((srcVal === undefined || srcVal === null || srcVal === "") && rawSource) {
+      srcVal = rawSource[key];
+    }
+    // 3. 如果是对象类型（如布尔开关）转为字符串
+    if (typeof srcVal === "boolean") {
+      srcVal = srcVal ? "1" : "0";
+    }
+    if (srcVal !== undefined && srcVal !== null && srcVal !== "") {
+      values[key] = String(srcVal);
+      changed = true;
+    }
+  });
+
+  if (changed) {
+    contractDetailState.value.templateFieldValues = values;
+  }
+}
+
 defineExpose({
   showModal,
 });
@@ -1398,3 +1442,7 @@ onBeforeUnmount(() => {
   }
 }
 </style>
+
+
+
+