diff --git a/backend/src/main/java/com/yfd/platform/qgc_export/mapper/MsAlongdetBMapper.java b/backend/src/main/java/com/yfd/platform/qgc_export/mapper/MsAlongdetBMapper.java
new file mode 100644
index 00000000..1d39f300
--- /dev/null
+++ b/backend/src/main/java/com/yfd/platform/qgc_export/mapper/MsAlongdetBMapper.java
@@ -0,0 +1,25 @@
+package com.yfd.platform.qgc_export.mapper;
+
+import org.apache.ibatis.annotations.Param;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * MS_ALONGDET_B 沿程配置详情表 Mapper
+ */
+public interface MsAlongdetBMapper {
+
+    /**
+     * 查询指定 STTP 类型的出库沿程配置（IO_DIRECTION=1），按 SORT 排序。
+     */
+    List<Map<String, Object>> selectAlongStations(@Param("sttp") String sttp,
+                                                   @Param("rstcdList") List<String> rstcdList);
+
+    /**
+     * 查询所有沿程配置的电站排序（MS_ALONG_B JOIN MS_ALONGDET_B），
+     * 按 MS_ALONG_B.ORDER_INDEX, MS_ALONGDET_B.SORT 排序。
+     * 返回 RSTCD, ORDER_INDEX。
+     */
+    List<Map<String, Object>> selectAlongSortOrder(@Param("rstcdList") List<String> rstcdList);
+}
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 05089b7e..637a7fbf 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
@@ -13,6 +13,7 @@ import com.yfd.platform.qgc_export.mapper.SdHydropwdaySMapper;
 import com.yfd.platform.qgc_export.mapper.SdQecRMapper;
 import com.yfd.platform.qgc_export.mapper.SdQecdaySMapper;
 import com.yfd.platform.qgc_export.mapper.StationMappingMapper;
+import com.yfd.platform.qgc_export.mapper.MsAlongdetBMapper;
 import com.yfd.platform.qgc_export.processor.*;
 import com.yfd.platform.qgc_export.service.IQgcExportService;
 import com.yfd.platform.qgc_eng.eq.entity.vo.EngEqRuleVo;
@@ -142,6 +143,9 @@ public class QgcExportServiceImpl implements IQgcExportService {
     @Resource
     private EngEqDataService engEqDataService;
 
+    @Resource
+    private MsAlongdetBMapper msAlongdetBMapper;
+
     private static final SimpleDateFormat SDF_TIME = new SimpleDateFormat("dd日 HH时");
     private static final SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 
@@ -174,10 +178,8 @@ public class QgcExportServiceImpl implements IQgcExportService {
             return;
         }
 
-        // 4. 电站顺序
-        List<String> stationOrder = new ArrayList<>(stationRes.displayNames.keySet());
-
-        // 5. 每月一个 ExcelData
+        // 4. 电站顺序：优先按沿程配置 MS_ALONG_B.ORDER_INDEX 排序，其余保持前端传入顺序
+        List<String> stationOrder = buildAlongSortedOrder(stationCodes, stationRes);
         String timestamp = String.valueOf(System.currentTimeMillis());
         List<ExportZipUtil.ExcelData> excelList = new ArrayList<>();
         for (String month : months) {
@@ -188,6 +190,7 @@ public class QgcExportServiceImpl implements IQgcExportService {
             // 判断是否包含水质指标，后续用于追加 WQ 合规 Sheet
             boolean hasWqIndicator = false;
             for (ExportIndicatorProcessor processor : processors) {
+                String sttp = processor.getSttpType();
                 List<List<Object>> rows;
                 // QEC 自定义三栏达标率格式
                 if (processor instanceof QecProcessor) {
@@ -197,7 +200,6 @@ public class QgcExportServiceImpl implements IQgcExportService {
                 }
                 if (rows != null) {
                     List<String> headers;
-                    String sttp = processor.getSttpType();
                     if (processor instanceof QecProcessor) {
                         // 分部标题作为列标题（合并单元格）
                         String[] sectionTitles = {"生态流量达标率(环保部)", "生态流量达标率(水利部)", "生态流量达标率(多年平均)"};
@@ -824,6 +826,47 @@ public class QgcExportServiceImpl implements IQgcExportService {
         return result;
     }
 
+    /**
+     * 按沿程配置 MS_ALONG_B.ORDER_INDEX 排序电站列表。
+     * 有沿程配置的电站排前面，无配置的保持原有顺序排后面。
+     */
+    private List<String> buildAlongSortedOrder(List<String> rstcds, StationResolution stationRes) {
+        if (rstcds.isEmpty()) return Collections.emptyList();
+
+        // 查询沿程配置：MS_ALONGDET_B JOIN MS_ALONG_B，按 ORDER_INDEX, SORT 排序
+        List<Map<String, Object>> alongList = msAlongdetBMapper.selectAlongSortOrder(rstcds);
+        if (alongList.isEmpty()) {
+            return new ArrayList<>(stationRes.displayNames.keySet());
+        }
+
+        // 按 ORDER_INDEX 分组去重，保留每站的最小 ORDER_INDEX
+        Map<String, Integer> rstcdOrderMap = new LinkedHashMap<>();
+        for (Map<String, Object> row : alongList) {
+            String rstcd = (String) row.get("RSTCD");
+            Object orderIdx = row.get("ORDER_INDEX");
+            if (rstcd != null && orderIdx != null && !rstcdOrderMap.containsKey(rstcd)) {
+                rstcdOrderMap.put(rstcd, ((Number) orderIdx).intValue());
+            }
+        }
+
+        // 有沿程配置的电站按 ORDER_INDEX 升序，无配置的排后面
+        List<String> alongSorted = new ArrayList<>();
+        List<String> remaining = new ArrayList<>();
+        for (String rstcd : stationRes.displayNames.keySet()) {
+            if (rstcdOrderMap.containsKey(rstcd)) {
+                alongSorted.add(rstcd);
+            } else {
+                remaining.add(rstcd);
+            }
+        }
+        alongSorted.sort(Comparator.comparingInt(rstcdOrderMap::get));
+
+        List<String> result = new ArrayList<>(alongSorted);
+        result.addAll(remaining);
+        log.info("沿程排序完成，有沿程={}, 无沿程={}", alongSorted.size(), remaining.size());
+        return result;
+    }
+
     // ======================== 月份范围 ========================
 
     private MonthRange buildMonthRange(String month) {
diff --git a/backend/src/main/resources/mapper/qgc_export/MsAlongdetBMapper.xml b/backend/src/main/resources/mapper/qgc_export/MsAlongdetBMapper.xml
new file mode 100644
index 00000000..0500cd83
--- /dev/null
+++ b/backend/src/main/resources/mapper/qgc_export/MsAlongdetBMapper.xml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.yfd.platform.qgc_export.mapper.MsAlongdetBMapper">
+
+    <!-- 查询指定 STTP 的出库沿程配置，关联 V_MS_STBPRP_T 获取测站名称 -->
+    <select id="selectAlongStations" resultType="java.util.HashMap">
+        SELECT
+            A.RSTCD,
+            A.STCD,
+            A.SORT,
+            A.STTP,
+            S.STNM,
+            S.BASE_NAME
+        FROM MS_ALONGDET_B A
+        LEFT JOIN V_MS_STBPRP_T S ON S.STCD = A.STCD AND S.STTP = A.STTP
+        WHERE NVL(A.IS_DELETED, 0) = 0
+        AND A.IO_DIRECTION = '1'
+        AND A.STTP = #{sttp}
+        AND A.RSTCD IN
+        <foreach collection="rstcdList" item="rstcd" open="(" separator="," close=")">
+            #{rstcd}
+        </foreach>
+        ORDER BY A.SORT
+    </select>
+
+    <!-- 查询所有沿程配置的电站排序（MS_ALONG_B + MS_ALONGDET_B），
+         按 MS_ALONG_B.ORDER_INDEX, MS_ALONGDET_B.SORT 排序 -->
+    <select id="selectAlongSortOrder" resultType="java.util.HashMap">
+        SELECT D.STCD, B.ORDER_INDEX
+        FROM MS_ALONGDET_B D
+        INNER JOIN MS_ALONG_B B ON B.ID = D.ALONG_ID AND NVL(B.IS_DELETED, 0) = 0
+        WHERE NVL(D.IS_DELETED, 0) = 0
+--         AND D.IO_DIRECTION = '1'
+        AND D.STCD IN
+        <foreach collection="rstcdList" item="rstcd" open="(" separator="," close=")">
+            #{rstcd}
+        </foreach>
+        ORDER BY B.ORDER_INDEX, D.SORT
+    </select>
+
+</mapper>