diff --git a/klp-wms/src/main/java/com/klp/controller/WmsMaterialCoilController.java b/klp-wms/src/main/java/com/klp/controller/WmsMaterialCoilController.java
index e956902e..a475fb92 100644
--- a/klp-wms/src/main/java/com/klp/controller/WmsMaterialCoilController.java
+++ b/klp-wms/src/main/java/com/klp/controller/WmsMaterialCoilController.java
@@ -657,6 +657,23 @@ public class WmsMaterialCoilController extends BaseController {
         return toAjax(iWmsMaterialCoilService.fixMaterialMismatchCoils(coilId));
     }
 
+    /**
+     * 根据入场钢卷号查询最早的热轧卷板材质
+     * 前端传入某个入场钢卷号，查询该组钢卷中是否有热轧卷板
+     * 如果有，返回最早创建的热轧卷板的材质信息
+     *
+     * @param enterCoilNo 入场钢卷号
+     * @return 材质信息
+     */
+    @GetMapping("/queryEarliestHotRolledMaterial")
+    public R<String> queryEarliestHotRolledMaterial(@NotBlank(message = "入场钢卷号不能为空") @RequestParam String enterCoilNo) {
+        String material = iWmsMaterialCoilService.queryEarliestHotRolledMaterial(enterCoilNo);
+        if (material == null) {
+            return R.fail("未找到该入场钢卷号对应的热轧卷板材质");
+        }
+        return R.ok(material, "查询成功");
+    }
+
 
 }
 
diff --git a/klp-wms/src/main/java/com/klp/mapper/WmsMaterialCoilMapper.java b/klp-wms/src/main/java/com/klp/mapper/WmsMaterialCoilMapper.java
index 1aab252c..35462b01 100644
--- a/klp-wms/src/main/java/com/klp/mapper/WmsMaterialCoilMapper.java
+++ b/klp-wms/src/main/java/com/klp/mapper/WmsMaterialCoilMapper.java
@@ -127,5 +127,12 @@ List<WmsMaterialCoilDeliveryExportVo> selectDeliveryExportListByCoilIds(@Param("
      * 分页查询材质异常的钢卷
      */
     IPage<WmsMaterialCoil> selectMaterialMismatchCoilsPage(IPage<WmsMaterialCoil> page);
+
+    /**
+     * 根据入场钢卷号查询最早的热轧卷板材质
+     * @param enterCoilNo 入场钢卷号
+     * @return 材质信息
+     */
+    String selectEarliestHotRolledMaterial(@Param("enterCoilNo") String enterCoilNo);
 }
 
diff --git a/klp-wms/src/main/java/com/klp/service/IWmsMaterialCoilService.java b/klp-wms/src/main/java/com/klp/service/IWmsMaterialCoilService.java
index 06c107fa..4f9a8ec6 100644
--- a/klp-wms/src/main/java/com/klp/service/IWmsMaterialCoilService.java
+++ b/klp-wms/src/main/java/com/klp/service/IWmsMaterialCoilService.java
@@ -304,6 +304,16 @@ public interface IWmsMaterialCoilService {
      */
     Boolean fixMaterialMismatchCoils(Long coilId);
 
+    /**
+     * 根据入场钢卷号查询最早的热轧卷板材质
+     * 用于前端传入某个入场钢卷号，查询该组钢卷中是否有热轧卷板
+     * 如果有，返回最早创建的热轧卷板的材质信息
+     *
+     * @param enterCoilNo 入场钢卷号
+     * @return 材质信息，如果没有热轧卷板则返回null
+     */
+    String queryEarliestHotRolledMaterial(String enterCoilNo);
+
     /**
      * 退火报表导出数据列表（按 coilIds）
      *
diff --git a/klp-wms/src/main/java/com/klp/service/impl/WmsMaterialCoilServiceImpl.java b/klp-wms/src/main/java/com/klp/service/impl/WmsMaterialCoilServiceImpl.java
index 221fddf4..28cc1b09 100644
--- a/klp-wms/src/main/java/com/klp/service/impl/WmsMaterialCoilServiceImpl.java
+++ b/klp-wms/src/main/java/com/klp/service/impl/WmsMaterialCoilServiceImpl.java
@@ -5514,6 +5514,22 @@ public class WmsMaterialCoilServiceImpl implements IWmsMaterialCoilService {
         return dto;
     }
 
+    @Override
+    public String queryEarliestHotRolledMaterial(String enterCoilNo) {
+        if (StringUtils.isBlank(enterCoilNo)) {
+            throw new RuntimeException("入场钢卷号不能为空");
+        }
+
+        // 查询该入场钢卷号下最早创建的热轧卷板的材质
+        String material = baseMapper.selectEarliestHotRolledMaterial(enterCoilNo);
+
+        if (StringUtils.isBlank(material)) {
+            // 找不到返回空值说明这个钢卷号对应的组没有热轧卷板
+            return null;
+        }
+
+        return material;
+    }
 
 
 }
diff --git a/klp-wms/src/main/resources/mapper/klp/WmsMaterialCoilMapper.xml b/klp-wms/src/main/resources/mapper/klp/WmsMaterialCoilMapper.xml
index 82fec970..e80b5102 100644
--- a/klp-wms/src/main/resources/mapper/klp/WmsMaterialCoilMapper.xml
+++ b/klp-wms/src/main/resources/mapper/klp/WmsMaterialCoilMapper.xml
@@ -1068,5 +1068,19 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             )
     </select>
 
+    <!-- 根据入场钢卷号查询最早的热轧卷板材质 -->
+    <select id="selectEarliestHotRolledMaterial" resultType="java.lang.String">
+        SELECT rm.material
+        FROM wms_material_coil mc
+        LEFT JOIN wms_raw_material rm ON mc.item_type = 'raw_material' AND mc.item_id = rm.raw_material_id AND rm.del_flag = 0
+        WHERE mc.del_flag = 0
+          AND mc.enter_coil_no = #{enterCoilNo}
+          AND mc.item_type = 'raw_material'
+          AND rm.raw_material_name LIKE '%热轧卷板%'
+          AND rm.material IS NOT NULL
+        ORDER BY mc.create_time ASC
+        LIMIT 1
+    </select>
+
 </mapper>