diff --git a/src/views/payment/payment-application-form.vue b/src/views/payment/payment-application-form.vue
index 482272d..90bb5f0 100644
--- a/src/views/payment/payment-application-form.vue
+++ b/src/views/payment/payment-application-form.vue
@@ -415,7 +415,8 @@
               ><el-input
                 v-model="row.description"
                 :disabled="readonly"
-                maxlength="200" /></template></el-table-column
+                maxlength="200"
+                placeholder="请输入" /></template></el-table-column
           ><el-table-column label="文件大小" width="120"
             ><template #default="{ row }">{{
               formatAttachmentSize(row)
@@ -2084,10 +2085,10 @@ export default {
     mergeAutomaticAttachments(
       files,
       materials,
-      sourceName,
       defaultMaterial = null,
       sourceKey = '',
-      keepUnmatched = false
+      keepUnmatched = false,
+      insertIndex = -1
     ) {
       const existingUrls = new Set(
         (this.form.attachments || []).map(file => this.attachmentFileUrl(file)).filter(Boolean)
@@ -2111,35 +2112,39 @@ export default {
             url,
             link: file.link || url,
             attachmentType: material ? MATERIAL_TYPE_MAP[material.key] : 'other',
-            description: file.description || `自动取自${sourceName}`,
+            description: file.description || '',
             sourceImported: true,
             sourceKey: sourceKey || undefined,
           };
         });
-      if (imported.length) this.form.attachments = [...this.form.attachments, ...imported];
+      if (imported.length) {
+        // 回填到被替换附件的原起始位置，避免回显/切换时把用户新传附件顶到前面
+        const attachments = [...this.form.attachments];
+        const insertAt =
+          insertIndex >= 0 ? Math.min(insertIndex, attachments.length) : attachments.length;
+        attachments.splice(insertAt, 0, ...imported);
+        this.form.attachments = attachments;
+      }
       return imported;
     },
-    /** 移除指定来源的自动关联附件（切换结算单/合同时整批替换） */
-    removeAutomaticAttachments(sourceKey, sourceName = '') {
+    /** 移除指定来源的自动关联附件（切换结算单/合同时整批替换），返回首个被移除的位置 */
+    removeAutomaticAttachments(sourceKey) {
       const previousUrls = new Set(
         sourceKey === 'settlement' ? this.linkedSettlementAttachmentUrls || [] : []
       );
-      this.form.attachments = (this.form.attachments || []).filter(file => {
+      let firstRemovedIndex = -1;
+      this.form.attachments = (this.form.attachments || []).filter((file, index) => {
         const url = this.attachmentFileUrl(file);
-        if (sourceKey && file.sourceKey === sourceKey) return false;
-        if (
-          sourceName &&
-          file.sourceImported &&
-          String(file.description || '').includes(`自动取自${sourceName}`)
-        ) {
-          return false;
-        }
-        if (previousUrls.size && url && previousUrls.has(url)) return false;
-        return true;
+        const keep =
+          !(sourceKey && file.sourceKey === sourceKey) &&
+          !(previousUrls.size && url && previousUrls.has(url));
+        if (!keep && firstRemovedIndex === -1) firstRemovedIndex = index;
+        return keep;
       });
       if (sourceKey === 'settlement') {
         this.linkedSettlementAttachmentUrls = [];
       }
+      return firstRemovedIndex;
     },
     /** 按当前结算单附件整批同步：先清旧关联，再写入新结算单上传的附件 */
     syncSettlementAttachments(settlementRows = []) {
@@ -2154,14 +2159,14 @@ export default {
           .map(file => this.attachmentFileUrl(file))
           .filter(url => url && nextUrlSet.has(url));
       }
-      this.removeAutomaticAttachments('settlement', '结算单');
+      const removedAt = this.removeAutomaticAttachments('settlement');
       const imported = this.mergeAutomaticAttachments(
         settlementFiles,
         settlementMaterials,
-        '结算单',
         null,
         'settlement',
-        true
+        true,
+        removedAt
       );
       this.linkedSettlementAttachmentUrls = imported
         .map(file => this.attachmentFileUrl(file))
@@ -2212,7 +2217,7 @@ export default {
         this.syncSettlementAttachments(settlementRows);
         if (!this.form.contractId) {
           this.firstContractPayment = false;
-          this.removeAutomaticAttachments('contract', '合同');
+          this.removeAutomaticAttachments('contract');
           return;
         }
         const contractResponse = await getContractDetail(this.form.contractId);
@@ -2224,13 +2229,14 @@ export default {
           this.contractSignatureFileAvailable = contractFiles.some(file =>
             Boolean(this.attachmentFileUrl(file))
           );
-          this.removeAutomaticAttachments('contract', '合同');
+          const contractRemovedAt = this.removeAutomaticAttachments('contract');
           this.mergeAutomaticAttachments(
             contractFiles,
             [ATTACHMENT_MATERIALS.contract],
-            '合同',
             ATTACHMENT_MATERIALS.contract,
-            'contract'
+            'contract',
+            false,
+            contractRemovedAt
           );
           return;
         }
@@ -2244,14 +2250,15 @@ export default {
             String(item.id || '') !== String(this.form.id || '') &&
             item.approvalStatus !== 'voided'
         );
-        this.removeAutomaticAttachments('contract', '合同');
+        const contractRemovedAt = this.removeAutomaticAttachments('contract');
         if (this.firstContractPayment) {
           this.mergeAutomaticAttachments(
             this.parse(contract.contractFileJson),
             [ATTACHMENT_MATERIALS.contract],
-            '合同',
             ATTACHMENT_MATERIALS.contract,
-            'contract'
+            'contract',
+            false,
+            contractRemovedAt
           );
         }
       } catch (error) {
diff --git a/src/views/settlement/components/formal-settlement-editor.vue b/src/views/settlement/components/formal-settlement-editor.vue
index bc9fe4e..ecf348d 100644
--- a/src/views/settlement/components/formal-settlement-editor.vue
+++ b/src/views/settlement/components/formal-settlement-editor.vue
@@ -362,7 +362,6 @@
                 v-model="row.type"
                 filterable
                 placeholder="请选择类型"
-                @change="sortAttachments"
               >
                 <el-option
                   v-for="item in attachmentTypeOptions"
@@ -1530,7 +1529,6 @@ export default {
       this.selectedAttachmentRows = [];
       this.invoices = data.invoices || [];
       this.issuedInvoices = data.issuedInvoices || [];
-      this.sortAttachments();
       this.contracts = this.filterContracts(this.allContracts, this.form.projectId);
     },
     async initialize() {
@@ -3235,7 +3233,6 @@ export default {
         label: item.dictValue,
         value: item.dictValue,
       }));
-      this.sortAttachments();
     },
     resolveAttachmentType(fileName) {
       const normalizedName = String(fileName || '').toLocaleLowerCase();
@@ -3259,25 +3256,6 @@ export default {
       const typeText = String(item?.label || item?.value || '').trim();
       return typeText === '其他' || typeText === '其他附件';
     },
-    getAttachmentTypeOrder(type) {
-      const normalizedType = String(type || '').trim();
-      const index = this.attachmentTypeOptions.findIndex(
-        item =>
-          String(item.value || '').trim() === normalizedType ||
-          String(item.label || '').trim() === normalizedType
-      );
-      return index === -1 ? Number.MAX_SAFE_INTEGER : index;
-    },
-    sortAttachments() {
-      this.attachments = (this.attachments || [])
-        .map((file, index) => ({ file, index }))
-        .sort((a, b) => {
-          const orderDifference =
-            this.getAttachmentTypeOrder(a.file.type) - this.getAttachmentTypeOrder(b.file.type);
-          return orderDifference || a.index - b.index;
-        })
-        .map(item => item.file);
-    },
     getMissingAttachmentTypes(files = this.attachments) {
       const uploadedTypes = new Set(
         (files || [])
@@ -3307,7 +3285,6 @@ export default {
         size: this.formatAttachmentSize(file.size),
         url: file.url || file.link || '',
       });
-      this.sortAttachments();
     },
     handleAttachmentSelectionChange(rows) {
       this.selectedAttachmentRows = rows || [];
diff --git a/src/views/settlement/components/pre-settlement-editor.vue b/src/views/settlement/components/pre-settlement-editor.vue
index f45102d..5a368a2 100644
--- a/src/views/settlement/components/pre-settlement-editor.vue
+++ b/src/views/settlement/components/pre-settlement-editor.vue
@@ -371,7 +371,6 @@
                   v-model="row.type"
                   filterable
                   placeholder="请选择"
-                  @change="sortAttachments"
                 >
                   <el-option
                     v-for="item in attachmentTypeOptions"
@@ -1573,7 +1572,6 @@ export default {
           row => !isApprovalSettlementChange(row.changeContent)
         );
         this.attachments = this.parseAttachments(detail.attachmentsJson);
-        this.sortAttachments();
         this.selectedAttachmentRows = [];
         if (detail.contractId) {
           await this.ensureContractPartyOptions(detail.contractId, {
@@ -3099,7 +3097,6 @@ export default {
           uploadTime: existing?.uploadTime || file.uploadTime || uploadTime,
         };
       });
-      this.sortAttachments();
       this.selectedAttachmentRows = [];
     },
     async loadAttachmentTypeOptions() {
@@ -3115,7 +3112,6 @@ export default {
       } catch (error) {
         this.attachmentTypeOptions = [];
       }
-      this.sortAttachments();
     },
     resolveAttachmentType(fileName) {
       const normalizedName = String(fileName || '').toLocaleLowerCase();
@@ -3143,25 +3139,6 @@ export default {
         typeText === '其它附件'
       );
     },
-    getAttachmentTypeOrder(type) {
-      const normalizedType = String(type || '').trim();
-      const index = this.attachmentTypeOptions.findIndex(
-        item =>
-          String(item.value || '').trim() === normalizedType ||
-          String(item.label || '').trim() === normalizedType
-      );
-      return index === -1 ? Number.MAX_SAFE_INTEGER : index;
-    },
-    sortAttachments() {
-      this.attachments = (this.attachments || [])
-        .map((file, index) => ({ file, index }))
-        .sort((a, b) => {
-          const orderDifference =
-            this.getAttachmentTypeOrder(a.file.type) - this.getAttachmentTypeOrder(b.file.type);
-          return orderDifference || a.index - b.index;
-        })
-        .map(item => item.file);
-    },
     attachmentTypeName(type) {
       const option = this.attachmentTypeOptions.find(
         item => String(item.value) === String(type) || String(item.label) === String(type)