diff --git a/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/JYSDLBMapper.java b/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/JYSDLBMapper.java
index fd83eea86..24ae0097f 100644
--- a/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/JYSDLBMapper.java
+++ b/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/JYSDLBMapper.java
@@ -17,4 +17,13 @@ public interface JYSDLBMapper extends BaseMapper<JYSDLB> {
             + "WHERE LOWER(TRIM(a.\"账号\")) = LOWER(TRIM(#{username})) "
             + "OR LOWER(TRIM(a.\"统一账号\")) = LOWER(TRIM(#{username}))")
     String selectResearchOfficeIdByAccount(@Param("username") String username);
+
+    /**
+     * 按登录用户所属部门（SYS_USER.DEPT_ID = 教研室表.部门编号）解析教研室。
+     * 用于持有教研室角色的系统账号（旧账号体系的教研室登录表未绑定时兜底）。
+     */
+    @Select("SELECT TRIM(b.\"教研室代号\") FROM \"教研室表\" b "
+            + "JOIN SYS_USER u ON u.DEPT_ID = b.\"部门编号\" "
+            + "WHERE LOWER(TRIM(u.USER_NAME)) = LOWER(TRIM(#{username})) AND ROWNUM = 1")
+    String selectResearchOfficeIdByUserDept(@Param("username") String username);
 }
diff --git a/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/service/impl/TeachingMaterialServiceImpl.java b/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/service/impl/TeachingMaterialServiceImpl.java
index 9a125d458..0fe7bdf15 100644
--- a/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/service/impl/TeachingMaterialServiceImpl.java
+++ b/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/service/impl/TeachingMaterialServiceImpl.java
@@ -257,7 +257,7 @@ public class TeachingMaterialServiceImpl implements TeachingMaterialService {
     public void downloadTemplate(HttpServletResponse response) {
         try {
             // 从resources/template目录读取模板文件
-            ClassPathResource resource = new ClassPathResource("template/教材管理.xls");
+            ClassPathResource resource = new ClassPathResource("file/教材管理.xls");
             InputStream is = resource.getInputStream();
 
             // 设置响应头
diff --git a/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/utils/JwglRoleHelper.java b/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/utils/JwglRoleHelper.java
index 501d3f1e5..7eefcd73a 100644
--- a/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/utils/JwglRoleHelper.java
+++ b/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/utils/JwglRoleHelper.java
@@ -103,7 +103,12 @@ public class JwglRoleHelper {
             if (StringUtils.isEmpty(username) || jysdlbMapper == null) {
                 return null;
             }
-            return jysdlbMapper.selectResearchOfficeIdByAccount(username);
+            String officeId = jysdlbMapper.selectResearchOfficeIdByAccount(username);
+            // 教研室角色账号按所属部门解析教研室；普通教员不得走此通道
+            if (StringUtils.isEmpty(officeId) && hasRoleKey(ROLE_RESEARCH_OFFICE)) {
+                officeId = jysdlbMapper.selectResearchOfficeIdByUserDept(username);
+            }
+            return officeId;
         } catch (Exception ignored) {
             return null;
         }