diff --git a/inventory-backend/app/api/v1/purchase.py b/inventory-backend/app/api/v1/purchase.py
index aa68fc7..d52ba4e 100644
--- a/inventory-backend/app/api/v1/purchase.py
+++ b/inventory-backend/app/api/v1/purchase.py
@@ -74,6 +74,11 @@ def create_purchase_request():
             if field not in data or str(data.get(field, '')).strip() == '':
                 return jsonify({'code': 400, 'msg': f'缺少必填字段: {field}'}), 400
 
+        # 图片必填强校验
+        images = data.get('images')
+        if not images or (isinstance(images, list) and len(images) == 0):
+            return jsonify({'code': 400, 'msg': '请上传采购凭证/物品图片'}), 400
+
         purchase = PurchaseService.create_purchase_request(data, requester_id=user_id)
 
         return jsonify({
@@ -200,3 +205,29 @@ def auto_fill_purchase():
         return jsonify({'code': 200, 'msg': 'ok', 'data': result}), 200
     except Exception as e:
         return jsonify({'code': 500, 'msg': str(e)}), 500
+
+
+# --------------------------------------------------------
+# 7. 物料基础信息搜索（分页）
+# GET /api/v1/purchase/search-material?keyword=xxx&page=1
+# --------------------------------------------------------
+@purchase_bp.route('/search-material', methods=['GET'])
+@jwt_required()
+def search_material_for_purchase():
+    """物料基础信息搜索接口，支持分页，用于采购申请弹窗"""
+    try:
+        keyword = request.args.get('keyword', '')
+        page = request.args.get('page', 1, type=int)
+        limit = 20
+
+        result = PurchaseService.search_base_material(keyword, page, limit)
+        return jsonify({
+            'code': 200,
+            'msg': 'success',
+            'data': result['items'],
+            'total': result['total'],
+            'has_next': result['has_next']
+        }), 200
+    except Exception as e:
+        traceback.print_exc()
+        return jsonify({'code': 500, 'msg': str(e)}), 500
diff --git a/inventory-backend/app/services/purchase_service.py b/inventory-backend/app/services/purchase_service.py
index b9f7a28..41befd1 100644
--- a/inventory-backend/app/services/purchase_service.py
+++ b/inventory-backend/app/services/purchase_service.py
@@ -138,6 +138,49 @@ class PurchaseService:
         purchase = db.session.get(PurchaseRequest, purchase_id)
         return purchase.to_dict() if purchase else None
 
+    @staticmethod
+    def search_base_material(keyword: str, page: int = 1, limit: int = 20):
+        """
+        物料基础信息搜索，支持 name/spec_model/company_name 模糊匹配，返回分页结果
+        用于采购申请弹窗的物料远程搜索
+        """
+        from sqlalchemy import and_, or_
+
+        query = MaterialBase.query.filter(MaterialBase.is_enabled == True)
+
+        if keyword:
+            k = keyword.strip()
+            k_str = f'%{k}%'
+            query = query.filter(or_(
+                MaterialBase.name.ilike(k_str),
+                MaterialBase.spec_model.ilike(k_str),
+                MaterialBase.company_name.ilike(k_str)
+            ))
+
+        query = query.order_by(MaterialBase.id.desc())
+        pagination = query.paginate(page=page, per_page=limit, error_out=False)
+
+        items = []
+        for item in pagination.items:
+            items.append({
+                'id': item.id,
+                'company_name': item.company_name,
+                'name': item.name,
+                'spec_model': item.spec_model,
+                'category': item.category,
+                'unit': item.unit,
+                'type': item.material_type,
+                'pinyin': getattr(item, 'pinyin', ''),
+                'status': '启用'
+            })
+
+        return {
+            'items': items,
+            'total': pagination.total,
+            'page': page,
+            'has_next': pagination.has_next
+        }
+
     @staticmethod
     def _notify_new_request(purchase):
         """发送新申请邮件给审批人"""
diff --git a/inventory-web/src/api/purchase.ts b/inventory-web/src/api/purchase.ts
index 610577f..f16b957 100644
--- a/inventory-web/src/api/purchase.ts
+++ b/inventory-web/src/api/purchase.ts
@@ -89,3 +89,12 @@ export function autoFillPurchase(keyword: string) {
     params: { keyword }
   })
 }
+
+// 物料基础信息搜索（分页），用于采购申请弹窗
+export function searchMaterialPurchase(keyword: string, page: number = 1) {
+  return request({
+    url: '/purchase/search-material',
+    method: 'get',
+    params: { keyword, page }
+  })
+}
diff --git a/inventory-web/src/views/purchase/index.vue b/inventory-web/src/views/purchase/index.vue
index a7b9cec..bb8df41 100644
--- a/inventory-web/src/views/purchase/index.vue
+++ b/inventory-web/src/views/purchase/index.vue
@@ -83,6 +83,8 @@
                   @change="onMaterialSelected"
                   default-first-option
                   popper-class="long-dropdown"
+                  v-loadmore="handleLoadMoreMaterials"
+                  @visible-change="onMaterialDropdownVisibleChange"
               >
                 <el-option
                     v-for="item in materialOptions"
@@ -95,6 +97,9 @@
                     <span style="color: #999; font-size: 12px;">{{ item.spec_model || '-' }}</span>
                   </div>
                 </el-option>
+                <li v-if="loadingMore" class="el-select-dropdown__item loading-more" style="text-align:center;color:#999;cursor:default;">
+                  <span>加载中...</span>
+                </li>
               </el-select>
               <div v-if="autoFillHint" style="font-size: 12px; color: #67C23A; margin-top: 4px;">{{ autoFillHint }}</div>
             </el-form-item>
@@ -142,7 +147,7 @@
             </el-form-item>
           </el-col>
           <el-col :span="24">
-            <el-form-item label="图片上传">
+            <el-form-item label="图片上传" required>
               <el-upload
                   v-model:file-list="fileList"
                   :http-request="customUpload"
@@ -233,7 +238,7 @@ import { ref, computed, onMounted } from 'vue'
 import { Refresh, Plus } from '@element-plus/icons-vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { useUserStore } from '@/stores/user'
-import { searchMaterialBase } from '@/api/inbound/buy'
+import { searchMaterialPurchase } from '@/api/purchase'
 import {
   getPurchaseList, createPurchase, getPurchaseDetail,
   approvePurchase, getPurchaseApprovers, autoFillPurchase
@@ -277,6 +282,22 @@ const approvers = ref<any[]>([])
 const materialOptions = ref<any[]>([])
 const searchLoading = ref(false)
 const materialBaseId = ref<number | null>(null)
+const searchPage = ref(1)
+const searchKeyword = ref('')
+const hasNextPage = ref(true)
+const loadingMore = ref(false)
+
+// v-loadmore 指令：监听 el-select 下拉滚动，滚动到底部时触发回调
+const vLoadmore = {
+  mounted(el: any, binding: any) {
+    const dropdown = el.querySelector?.('.el-select-dropdown__wrap')
+    if (!dropdown) return
+    dropdown.addEventListener('scroll', function (this: any) {
+      const condition = this.scrollHeight - this.scrollTop <= this.clientHeight + 2
+      if (condition) binding.value()
+    })
+  }
+}
 
 // 表单
 const form = ref({
@@ -362,10 +383,11 @@ const openCreateDialog = () => {
   materialOptions.value = []
   autoFillHint.value = ''
   fileList.value = []
+  totalPriceManuallyEdited.value = false
   formDialogVisible.value = true
 }
 
-// --- 物料搜索 ---
+// --- 物料搜索（分页） ---
 let searchTimer: any = null
 const handleSearchMaterialDebounced = (query: string) => {
   clearTimeout(searchTimer)
@@ -373,19 +395,46 @@ const handleSearchMaterialDebounced = (query: string) => {
 }
 
 const handleSearchMaterial = async (query: string) => {
-  if (!query.trim()) {
-    materialOptions.value = []
-    return
-  }
   searchLoading.value = true
+  searchKeyword.value = query
+  searchPage.value = 1
+  materialOptions.value = []
+  hasNextPage.value = true
+
   try {
-    const res: any = await searchMaterialBase(query, 1)
+    const res: any = await searchMaterialPurchase(query, 1)
     materialOptions.value = res.data || []
+    hasNextPage.value = res.has_next !== false
   } finally {
     searchLoading.value = false
   }
 }
 
+const handleLoadMoreMaterials = async () => {
+  if (searchLoading.value || loadingMore.value || !hasNextPage.value) return
+  loadingMore.value = true
+  searchPage.value += 1
+  try {
+    const res: any = await searchMaterialPurchase(searchKeyword.value, searchPage.value)
+    if (res.data && res.data.length > 0) {
+      materialOptions.value = [...materialOptions.value, ...res.data]
+      hasNextPage.value = res.has_next !== false
+    } else {
+      hasNextPage.value = false
+    }
+  } catch {
+    searchPage.value -= 1
+  } finally {
+    loadingMore.value = false
+  }
+}
+
+const onMaterialDropdownVisibleChange = (visible: boolean) => {
+  if (visible && materialOptions.value.length === 0) {
+    handleSearchMaterial('')
+  }
+}
+
 const onMaterialSelected = (id: number | null) => {
   if (!id) {
     materialBaseId.value = null
@@ -400,40 +449,21 @@ const onMaterialSelected = (id: number | null) => {
   }
 }
 
-// --- 价格自动计算（需确认）---
-let priceConfirmTimer: any = null
+// --- 价格半联动逻辑 ---
+// totalPriceManuallyEdited：标记总价是否被用户手动修改过，修改后不再自动覆盖
+const totalPriceManuallyEdited = ref(false)
+
 const onUnitPriceChange = (val: number | undefined) => {
-  if (priceConfirmTimer) clearTimeout(priceConfirmTimer)
-  priceConfirmTimer = setTimeout(() => {
-    if (val !== undefined && val > 0 && form.value.quantity > 0 && !form.value.total_price) {
-      ElMessageBox.confirm(
-        `即将自动计算总价：${val} × ${form.value.quantity} = ${+(val * form.value.quantity).toFixed(2)}，是否继续？`,
-        '自动计算确认',
-        { confirmButtonText: '确定', cancelButtonText: '取消', type: 'info' }
-      ).then(() => {
-        form.value.total_price = +(val * form.value.quantity).toFixed(2)
-      }).catch(() => {})
-    } else if (val !== undefined && val > 0 && form.value.quantity > 0) {
-      form.value.total_price = +(val * form.value.quantity).toFixed(2)
-    }
-  }, 300)
+  // 用户修改单价时：如果总价尚未被手动修改，则自动计算总价
+  if (val !== undefined && val > 0 && form.value.quantity > 0 && !totalPriceManuallyEdited.value) {
+    form.value.total_price = +(val * form.value.quantity).toFixed(2)
+  }
 }
 
-const onTotalPriceChange = (val: number | undefined) => {
-  if (priceConfirmTimer) clearTimeout(priceConfirmTimer)
-  priceConfirmTimer = setTimeout(() => {
-    if (val !== undefined && val > 0 && form.value.quantity > 0 && !form.value.unit_price) {
-      ElMessageBox.confirm(
-        `即将自动计算单价：${val} ÷ ${form.value.quantity} = ${+(val / form.value.quantity).toFixed(4)}，是否继续？`,
-        '自动计算确认',
-        { confirmButtonText: '确定', cancelButtonText: '取消', type: 'info' }
-      ).then(() => {
-        form.value.unit_price = +(val / form.value.quantity).toFixed(4)
-      }).catch(() => {})
-    } else if (val !== undefined && val > 0 && form.value.quantity > 0) {
-      form.value.unit_price = +(val / form.value.quantity).toFixed(4)
-    }
-  }, 300)
+const onTotalPriceChange = (_val: number | undefined) => {
+  // 用户手动修改总价时：标记为已手动修改，不再反向强制覆盖单价
+  // 允许用户输入打包一口价（如单价3元，买2个算5元），保留用户填入的单价和总价
+  totalPriceManuallyEdited.value = true
 }
 
 // --- 上传 ---