diff --git a/src/config.js b/src/config.js
index 7da3082..b66b25f 100644
--- a/src/config.js
+++ b/src/config.js
@@ -27,6 +27,9 @@ const parseUpgradeConfig = (configStr) => {
     }
 };
 
+const upgradeBatchSizeRaw = Number(process.env.UPGRADE_BATCH_SIZE || 1);
+const upgradeBatchSize = Number.isFinite(upgradeBatchSizeRaw) ? upgradeBatchSizeRaw : 1;
+
 module.exports = {
     port: process.env.PORT || 3000,
     db: {
@@ -42,5 +45,6 @@ module.exports = {
     upgradeWaitSeconds: Number(process.env.UPGRADE_WAIT_SECONDS || 45),
     upgradePollIntervalSeconds: Number(process.env.UPGRADE_POLL_INTERVAL_SECONDS || 45),
     upgradePollTimeoutSeconds: Number(process.env.UPGRADE_POLL_TIMEOUT_SECONDS || 300),
+    upgradeBatchSize,
     upgradeConfig: parseUpgradeConfig(process.env.UPGRADE_CONFIG)
 };
diff --git a/src/upgradeController.js b/src/upgradeController.js
index a306efd..c58c7a3 100644
--- a/src/upgradeController.js
+++ b/src/upgradeController.js
@@ -36,22 +36,44 @@ const processGroup = async (group, groupIdx) => {
         }
 
         const hostQueue = group.hosts.map(String);
+        const batchSize = Number(config.upgradeBatchSize ?? 1);
+        const effectiveBatchSize = batchSize <= 0 ? hostQueue.length : Math.max(1, batchSize);
         console.log(`[${stateKey}] Starting queue. Roomtype: ${roomtype_id}. File: ${fileName}. Hosts: ${hostQueue.join(', ')}`);
 
         const waitSeconds = config.upgradeWaitSeconds || 45;
         const pollIntervalSeconds = config.upgradePollIntervalSeconds || 45;
         const pollTimeoutSeconds = config.upgradePollTimeoutSeconds || 300;
 
-        for (const hostId of hostQueue) {
+        for (let i = 0; i < hostQueue.length; i += effectiveBatchSize) {
+            const batchHosts = hostQueue.slice(i, i + effectiveBatchSize);
             const sessionUuid = uuidv4();
             const startTime = new Date();
 
-            console.log(`[${stateKey}] Triggering upgrade for host ${hostId}. Roomtype: ${roomtype_id}. File: ${fileName}.`);
+            console.log(`[${stateKey}] Triggering upgrade for hosts ${batchHosts.join(', ')}. Roomtype: ${roomtype_id}. File: ${fileName}.`);
 
             try {
-                const upgradeRes = await apiClient.triggerUpgrade(roomtype_id, [hostId], fileName);
+                const upgradeRes = await apiClient.triggerUpgrade(roomtype_id, batchHosts, fileName);
                 if (!upgradeRes.IsSuccess) {
-                    console.error(`[${stateKey}] Upgrade trigger failed for host ${hostId}: ${upgradeRes.Message}`);
+                    console.error(`[${stateKey}] Upgrade trigger failed for hosts ${batchHosts.join(', ')}: ${upgradeRes.Message}`);
+                    for (const hostId of batchHosts) {
+                        await loggerService.logHostResult({
+                            uuid: sessionUuid,
+                            start_time: startTime.toISOString(),
+                            roomtype_id: roomtype_id,
+                            host_str: hostId,
+                            filename: fileName,
+                            status: '触发失败',
+                            end_time: new Date().toISOString(),
+                            file_type: '',
+                            config_version: '',
+                            firmware_version: ''
+                        });
+                    }
+                    continue;
+                }
+            } catch (e) {
+                console.error(`[${stateKey}] Upgrade trigger error for hosts ${batchHosts.join(', ')}:`, e.message);
+                for (const hostId of batchHosts) {
                     await loggerService.logHostResult({
                         uuid: sessionUuid,
                         start_time: startTime.toISOString(),
@@ -64,37 +86,25 @@ const processGroup = async (group, groupIdx) => {
                         config_version: '',
                         firmware_version: ''
                     });
-                    continue;
                 }
-            } catch (e) {
-                console.error(`[${stateKey}] Upgrade trigger error for host ${hostId}:`, e.message);
-                await loggerService.logHostResult({
-                    uuid: sessionUuid,
-                    start_time: startTime.toISOString(),
-                    roomtype_id: roomtype_id,
-                    host_str: hostId,
-                    filename: fileName,
-                    status: '触发失败',
-                    end_time: new Date().toISOString(),
-                    file_type: '',
-                    config_version: '',
-                    firmware_version: ''
-                });
                 continue;
             }
 
-            console.log(`[${stateKey}] Waiting ${waitSeconds}s for host ${hostId}...`);
+            console.log(`[${stateKey}] Waiting ${waitSeconds}s for hosts ${batchHosts.join(', ')}...`);
             await sleep(waitSeconds * 1000);
 
             const pollStartTime = Date.now();
-            let completed = false;
+            const pendingHosts = new Set(batchHosts.map(String));
 
-            while (Date.now() - pollStartTime < pollTimeoutSeconds * 1000) {
+            while (Date.now() - pollStartTime < pollTimeoutSeconds * 1000 && pendingHosts.size > 0) {
                 try {
-                    const queryRes = await apiClient.queryStatus([hostId]);
+                    const queryRes = await apiClient.queryStatus(batchHosts);
                     if (queryRes && Array.isArray(queryRes.Response)) {
-                        const hostStatus = queryRes.Response.find((item) => String(item.HostID) === String(hostId));
-                        if (hostStatus) {
+                        for (const hostStatus of queryRes.Response) {
+                            const hostId = String(hostStatus.HostID);
+                            if (!pendingHosts.has(hostId)) {
+                                continue;
+                            }
                             const rawStatus = hostStatus.Upgrade_status || '';
                             const status = rawStatus.trim();
                             if (['升级完成', '超时失败', '升级失败'].includes(status)) {
@@ -111,34 +121,35 @@ const processGroup = async (group, groupIdx) => {
                                     firmware_version: hostStatus.Version
                                 });
                                 console.log(`[${stateKey}] Host ${hostId} logged to DB with status: '${status}'.`);
-                                completed = true;
-                                break;
+                                pendingHosts.delete(hostId);
                             }
                         }
                     } else {
-                        console.warn(`[${stateKey}] Invalid query response for host ${hostId}:`, queryRes);
+                        console.warn(`[${stateKey}] Invalid query response for hosts ${batchHosts.join(', ')}:`, queryRes);
                     }
                 } catch (e) {
-                    console.error(`[${stateKey}] Poll error for host ${hostId}:`, e.message);
+                    console.error(`[${stateKey}] Poll error for hosts ${batchHosts.join(', ')}:`, e.message);
                 }
 
                 await sleep(pollIntervalSeconds * 1000);
             }
 
-            if (!completed) {
-                await loggerService.logHostResult({
-                    uuid: sessionUuid,
-                    start_time: startTime.toISOString(),
-                    roomtype_id: roomtype_id,
-                    host_str: hostId,
-                    filename: fileName,
-                    status: '超时失败',
-                    end_time: new Date().toISOString(),
-                    file_type: 'Unknown',
-                    config_version: '',
-                    firmware_version: ''
-                });
-                console.log(`[${stateKey}] Host ${hostId} timeout failed.`);
+            if (pendingHosts.size > 0) {
+                for (const hostId of pendingHosts) {
+                    await loggerService.logHostResult({
+                        uuid: sessionUuid,
+                        start_time: startTime.toISOString(),
+                        roomtype_id: roomtype_id,
+                        host_str: hostId,
+                        filename: fileName,
+                        status: '超时失败',
+                        end_time: new Date().toISOString(),
+                        file_type: 'Unknown',
+                        config_version: '',
+                        firmware_version: ''
+                    });
+                    console.log(`[${stateKey}] Host ${hostId} timeout failed.`);
+                }
             }
         }