diff --git a/frontend/src/pages/projects/ProjectDetail.tsx b/frontend/src/pages/projects/ProjectDetail.tsx
index 291aa28..e3f7220 100644
--- a/frontend/src/pages/projects/ProjectDetail.tsx
+++ b/frontend/src/pages/projects/ProjectDetail.tsx
@@ -1527,12 +1527,12 @@ const ProjectDetail: React.FC = () => {
             }
             
             const values = await contractForm.validateFields();
-            // 构建保存数据
+            const finalContractTotal = settlementType === 'unit_price' ? contractTotal : (values.contract_total || 0);
             const saveData = {
               project_id: id,
               project_overview: values.project_overview,
               settlement_type: values.settlement_type,
-              contract_total: contractTotal,
+              contract_total: finalContractTotal,
               tax_included: values.tax_included || false,
               unit_price_items: unitPriceItems,
               payment_nodes: paymentNodes,
@@ -1599,6 +1599,7 @@ const ProjectDetail: React.FC = () => {
                   placeholder="请输入合同总价" 
                   formatter={(value) => `¥ ${value}`}
                   parser={(value) => value?.replace(/¥\s?/, '')}
+                  onChange={(val) => setContractTotal(val || 0)}
                 />
               </Form.Item>
             )}