diff --git a/src/main/java/com/gxwebsoft/ai/service/impl/AbstractAuditContentService.java b/src/main/java/com/gxwebsoft/ai/service/impl/AbstractAuditContentService.java
index ccfbb21..cc2b2ff 100644
--- a/src/main/java/com/gxwebsoft/ai/service/impl/AbstractAuditContentService.java
+++ b/src/main/java/com/gxwebsoft/ai/service/impl/AbstractAuditContentService.java
@@ -16,6 +16,7 @@ import com.gxwebsoft.ai.factory.KnowledgeBaseClientFactory;
 import com.gxwebsoft.ai.service.AiCloudFileService;
 import com.gxwebsoft.ai.util.AiCloudKnowledgeBaseUtil;
 import com.gxwebsoft.common.core.context.TenantContext;
+import com.gxwebsoft.oa.service.OaCompanyService;
 
 import cn.hutool.core.util.StrUtil;
 import cn.hutool.http.HttpUtil;
@@ -41,6 +42,9 @@ public abstract class AbstractAuditContentService {
     @Autowired
     protected AiCloudFileService aiCloudFileService;
     
+    @Autowired
+    protected OaCompanyService oaCompanyService;
+    
     protected static final String DIFY_WORKFLOW_URL = "http://1.14.159.185:8180/v1/workflows/run";
     
     // 用于同步的锁对象池
@@ -195,6 +199,9 @@ public abstract class AbstractAuditContentService {
      * 查询知识库通用方法
      */
     protected List<String> queryKnowledgeBase(String kbId, List<String> queries, int topK) {
+        // 递归获取所有父级单位的kbId
+        Set<String> allKbIds = TenantContext.callIgnoreTenant(() -> oaCompanyService.getAllParentKbIds(kbId));
+        
         Object lock = kbLocks.computeIfAbsent(kbId, k -> new Object());
         
         synchronized (lock) {
@@ -206,8 +213,11 @@ public abstract class AbstractAuditContentService {
                     fileIds = requestFileIds.get();
                 }
                 
-                // 1. 收集所有节点和文档ID
-                List<RetrieveResponseBodyDataNodes> allNodes = collectKnowledgeNodes(kbId, queries, topK, fileIds);
+                // 1. 收集所有节点和文档ID（包含所有父级kbId）
+                List<RetrieveResponseBodyDataNodes> allNodes = new ArrayList<>();
+                for (String currentKbId : allKbIds) {
+                    allNodes.addAll(collectKnowledgeNodes(currentKbId, queries, topK, fileIds));
+                }
                 if (allNodes.isEmpty()) {
                     return new ArrayList<>();
                 }
diff --git a/src/main/java/com/gxwebsoft/oa/service/OaCompanyService.java b/src/main/java/com/gxwebsoft/oa/service/OaCompanyService.java
index dd91ee7..98fdc25 100644
--- a/src/main/java/com/gxwebsoft/oa/service/OaCompanyService.java
+++ b/src/main/java/com/gxwebsoft/oa/service/OaCompanyService.java
@@ -6,6 +6,7 @@ import com.gxwebsoft.oa.entity.OaCompany;
 import com.gxwebsoft.oa.param.OaCompanyParam;
 
 import java.util.List;
+import java.util.Set;
 
 /**
  * 企业信息Service
@@ -61,4 +62,12 @@ public interface OaCompanyService extends IService<OaCompany> {
      */
     boolean removeCompanyKnowledgeBase(Integer companyId);
 
+    /**
+     * 递归获取所有父级单位的kbId（包含当前单位）
+     *
+     * @param kbId 知识库ID
+     * @return 所有父级单位的kbId集合
+     */
+    Set<String> getAllParentKbIds(String kbId);
+
 }
diff --git a/src/main/java/com/gxwebsoft/oa/service/impl/OaCompanyServiceImpl.java b/src/main/java/com/gxwebsoft/oa/service/impl/OaCompanyServiceImpl.java
index f1b8937..be4b937 100644
--- a/src/main/java/com/gxwebsoft/oa/service/impl/OaCompanyServiceImpl.java
+++ b/src/main/java/com/gxwebsoft/oa/service/impl/OaCompanyServiceImpl.java
@@ -28,7 +28,9 @@ import org.springframework.stereotype.Service;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.LinkedHashSet;
 import java.util.List;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 /**
@@ -189,4 +191,43 @@ public class OaCompanyServiceImpl extends ServiceImpl<OaCompanyMapper, OaCompany
         }
         return ret;
     }
+    
+    @Override
+    public Set<String> getAllParentKbIds(String kbId) {
+        Set<String> kbIds = new LinkedHashSet<>();
+        kbIds.add(kbId);
+        
+        // 根据kbId查找OaCompany
+        OaCompany company = getOne(new LambdaQueryWrapper<OaCompany>().eq(OaCompany::getKbId, kbId));
+        
+        if (company != null && StrUtil.isNotBlank(company.getParentCompany())) {
+            // 递归查找父级
+            collectParentKbIds(company.getParentCompany(), kbIds);
+        }
+        
+        return kbIds;
+    }
+    
+    /**
+     * 递归收集父级kbId
+     */
+    private void collectParentKbIds(String parentCompanyId, Set<String> kbIds) {
+        if (StrUtil.isBlank(parentCompanyId)) {
+            return;
+        }
+        
+        // 查找父级公司
+        OaCompany parentCompany = getById(Integer.valueOf(parentCompanyId));
+        
+        if (parentCompany != null) {
+            // 添加父级kbId
+            if (StrUtil.isNotBlank(parentCompany.getKbId())) {
+                kbIds.add(parentCompany.getKbId());
+            }
+            // 继续递归查找父级的父级
+            if (StrUtil.isNotBlank(parentCompany.getParentCompany())) {
+                collectParentKbIds(parentCompany.getParentCompany(), kbIds);
+            }
+        }
+    }
 }