diff --git a/backend/src/main/java/com/yfd/platform/qgc_export/mapper/SdWqRMapper.java b/backend/src/main/java/com/yfd/platform/qgc_export/mapper/SdWqRMapper.java
index aa9cb6b2..433c6e62 100644
--- a/backend/src/main/java/com/yfd/platform/qgc_export/mapper/SdWqRMapper.java
+++ b/backend/src/main/java/com/yfd/platform/qgc_export/mapper/SdWqRMapper.java
@@ -39,4 +39,9 @@ public interface SdWqRMapper extends BaseMapper<SdWqR> {
     List<Map<String, Object>> selectPollutants(@Param("stcdList") List<String> stcdList,
                                                @Param("startTime") String startTime,
                                                @Param("endTime") String endTime);
+
+    /**
+     * 查询 SD_WQ_R 表的字段注释（字段名 → 中文描述）
+     */
+    List<Map<String, Object>> selectColumnComments();
 }
diff --git a/backend/src/main/java/com/yfd/platform/qgc_export/service/impl/QgcExportServiceImpl.java b/backend/src/main/java/com/yfd/platform/qgc_export/service/impl/QgcExportServiceImpl.java
index 9fb70f3e..05089b7e 100644
--- a/backend/src/main/java/com/yfd/platform/qgc_export/service/impl/QgcExportServiceImpl.java
+++ b/backend/src/main/java/com/yfd/platform/qgc_export/service/impl/QgcExportServiceImpl.java
@@ -518,9 +518,37 @@ public class QgcExportServiceImpl implements IQgcExportService {
         List<Map<String, Object>> hourlyData = sdWqRMapper.selectComplianceData(uniqueStcds, startStr, endStr);
         // 查询日均达标数据
         List<Map<String, Object>> dailyData = sdWqdaySMapper.selectComplianceData(uniqueStcds, startStr, endStr);
-        // 查询主要污染物
+        // 查询主要污染物（从小时表 WQ_SFDBHN_YS 获取）
         List<Map<String, Object>> pollutantData = sdWqRMapper.selectPollutants(uniqueStcds, startStr, endStr);
 
+        // 查询要素中文名映射（通过 ST_TB_YS_B.YS_SHOW_NAME，COLUMN_NAME → 显示名）
+        Map<String, String> colCommentMap = new LinkedHashMap<>();
+        List<Map<String, Object>> colComments = sdWqRMapper.selectColumnComments();
+        for (Map<String, Object> cm : colComments) {
+            String colName = (String) cm.get("COLUMN_NAME");
+            String comment = (String) cm.get("COMMENTS");
+            if (colName != null && comment != null && !comment.isEmpty()) {
+                colCommentMap.put(colName, comment);
+            }
+        }
+
+        // 按 STCD 聚合污染物（拆分逗号、映射中文名、去重）
+        Map<String, Set<String>> pollutantSetMap = new LinkedHashMap<>();
+        for (Map<String, Object> m : pollutantData) {
+            String stcd = (String) m.get("STCD");
+            String pol = (String) m.get("POLLUTANT");
+            if (pol != null && !pol.isEmpty()) {
+                Set<String> set = pollutantSetMap.computeIfAbsent(stcd, k -> new LinkedHashSet<>());
+                for (String field : pol.split(",")) {
+                    String f = field.trim();
+                    if (!f.isEmpty()) {
+                        String desc = colCommentMap.getOrDefault(f, f);
+                        set.add(desc);
+                    }
+                }
+            }
+        }
+
         // 按 STCD 索引达标统计
         Map<String, Map<String, Object>> hourlyMap = new LinkedHashMap<>();
         for (Map<String, Object> m : hourlyData) {
@@ -530,15 +558,6 @@ public class QgcExportServiceImpl implements IQgcExportService {
         for (Map<String, Object> m : dailyData) {
             dailyMap.put((String) m.get("STCD"), m);
         }
-        // 按 STCD 聚合污染物（去重后用逗号分隔）
-        Map<String, Set<String>> pollutantSetMap = new LinkedHashMap<>();
-        for (Map<String, Object> m : pollutantData) {
-            String stcd = (String) m.get("STCD");
-            String pol = (String) m.get("POLLUTANT");
-            if (pol != null && !pol.isEmpty()) {
-                pollutantSetMap.computeIfAbsent(stcd, k -> new LinkedHashSet<>()).add(pol);
-            }
-        }
 
         // ======== Row 0: 子标题行 ========
         List<Object> subRow = new ArrayList<>();
diff --git a/backend/src/main/resources/mapper/qgc_export/SdWqRMapper.xml b/backend/src/main/resources/mapper/qgc_export/SdWqRMapper.xml
index 987b757e..c19016a0 100644
--- a/backend/src/main/resources/mapper/qgc_export/SdWqRMapper.xml
+++ b/backend/src/main/resources/mapper/qgc_export/SdWqRMapper.xml
@@ -59,4 +59,13 @@
         AND TM &lt; TO_DATE(#{endTime}, 'YYYY-MM-DD HH24:MI:SS')
     </select>
 
+    <!-- 查询 SD_WQ_R 表的要素中文名（通过 ST_TB_B + ST_TB_YS_B 关联） -->
+    <select id="selectColumnComments" resultType="java.util.HashMap">
+        SELECT YS.YS AS COLUMN_NAME, YS.YS_SHOW_NAME AS COMMENTS
+        FROM ST_TB_B TB
+        INNER JOIN ST_TB_YS_B YS ON YS.TB_ID = TB.ID AND NVL(YS.IS_DELETED, 0) = 0
+        WHERE NVL(TB.IS_DELETED, 0) = 0
+        AND TB.TB = 'SD_WQ_R'
+    </select>
+
 </mapper>