diff --git a/backend/mci-server/src/main/java/com/sino/mci/channel/service/AccountSelector.java b/backend/mci-server/src/main/java/com/sino/mci/channel/service/AccountSelector.java
index e17a5a0..3dc31b8 100644
--- a/backend/mci-server/src/main/java/com/sino/mci/channel/service/AccountSelector.java
+++ b/backend/mci-server/src/main/java/com/sino/mci/channel/service/AccountSelector.java
@@ -16,6 +16,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Set;
 
 @Slf4j
 @Service
@@ -39,7 +40,14 @@ public class AccountSelector {
         return CollectionUtils.isEmpty(accounts) ? null : accounts.get(0);
     }
 
-    public List<Long> selectSendAccounts(String tenantCode, Long conversationId, ChannelType channelType, String preferredStrategy) {
+    public List<Long> selectSendAccounts(String tenantCode, Long conversationId,
+                                         ChannelType channelType, String preferredStrategy) {
+        return selectSendAccounts(tenantCode, conversationId, channelType, null, preferredStrategy);
+    }
+
+    public List<Long> selectSendAccounts(String tenantCode, Long conversationId,
+                                         ChannelType channelType, Set<Integer> accountTypes,
+                                         String preferredStrategy) {
         if (conversationId == null || channelType == null) {
             return Collections.emptyList();
         }
@@ -64,9 +72,13 @@ public class AccountSelector {
         List<Long> healthyAccountIds = new ArrayList<>();
         for (ChannelAccountConversation binding : bindings) {
             ChannelAccount account = accountMapper.selectById(binding.getAccountId());
-            if (isHealthy(account, tenantCode, channelType)) {
-                healthyAccountIds.add(account.getId());
+            if (!isHealthy(account, tenantCode, channelType)) {
+                continue;
             }
+            if (accountTypes != null && !accountTypes.contains(account.getAccountType())) {
+                continue;
+            }
+            healthyAccountIds.add(account.getId());
         }
         return healthyAccountIds;
     }
diff --git a/backend/mci-server/src/test/java/com/sino/mci/channel/service/AccountSelectorTest.java b/backend/mci-server/src/test/java/com/sino/mci/channel/service/AccountSelectorTest.java
index 87aa18b..1318794 100644
--- a/backend/mci-server/src/test/java/com/sino/mci/channel/service/AccountSelectorTest.java
+++ b/backend/mci-server/src/test/java/com/sino/mci/channel/service/AccountSelectorTest.java
@@ -14,6 +14,8 @@ import org.mockito.junit.jupiter.MockitoExtension;
 import java.time.LocalDateTime;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.List;
+import java.util.Set;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNull;
@@ -86,6 +88,20 @@ class AccountSelectorTest {
         assertEquals(2L, accountId);
     }
 
+    @Test
+    void selectSendAccountsFiltersByAccountType() {
+        ChannelAccountConversation primary = createBinding(1L, 1, 1);
+        ChannelAccountConversation backup = createBinding(2L, 2, 1);
+        when(accountConversationMapper.selectList(any())).thenReturn(Arrays.asList(primary, backup));
+        when(accountMapper.selectById(1L)).thenReturn(createHealthyAccount(1L, 1));
+        when(accountMapper.selectById(2L)).thenReturn(createHealthyAccount(2L, 3));
+
+        List<Long> accountIds = accountSelector.selectSendAccounts(
+                "tenant", 100L, ChannelType.WECHAT_PERSONAL, Set.of(1), "primary");
+
+        assertEquals(Collections.singletonList(1L), accountIds);
+    }
+
     private ChannelAccountConversation createBinding(Long accountId, int bindingType, int sortOrder) {
         ChannelAccountConversation binding = new ChannelAccountConversation();
         binding.setAccountId(accountId);
@@ -96,10 +112,14 @@ class AccountSelectorTest {
     }
 
     private ChannelAccount createHealthyAccount(Long id) {
+        return createHealthyAccount(id, 3);
+    }
+
+    private ChannelAccount createHealthyAccount(Long id, int accountType) {
         ChannelAccount account = new ChannelAccount();
         account.setId(id);
         account.setTenantCode("tenant");
-        account.setAccountType(3);
+        account.setAccountType(accountType);
         account.setChannelType("wechat_personal");
         account.setAccountId("wxid-" + id);
         account.setStatus(1);