diff --git a/platform/internal/dbsync/ensure_default_channel.go b/platform/internal/dbsync/ensure_default_channel.go
index 2266dab..5586dde 100644
--- a/platform/internal/dbsync/ensure_default_channel.go
+++ b/platform/internal/dbsync/ensure_default_channel.go
@@ -73,7 +73,7 @@ func (s *FileStore) EnsureSystemDefaultChannel(opts DefaultChannelOpts) (Channel
 	ch := Channel{
 		TenantID:        opts.TenantID,
 		Name:            name,
-		Enabled:         false, // 默认同步通道供 agent push 落点；不启本地 outbox 轮询
+		Enabled:         true, // 默认运行中：可收 agent push，并预热 remote
 		Direction:       DirLocalToRemote,
 		ConflictPolicy:  PolicyLWWSource,
 		IsSystemDefault: true,
@@ -107,3 +107,22 @@ func ResolveOnlineDBID(explicit, channelID string) string {
 	}
 	return strings.TrimSpace(channelID)
 }
+
+// EnsureAndStartSystemDefaultChannel 创建/复用公司默认同步通道，并确保处于运行中（Enabled + runner）。
+func (m *Manager) EnsureAndStartSystemDefaultChannel(opts DefaultChannelOpts) (Channel, error) {
+	if m == nil || m.store == nil {
+		return Channel{}, fmt.Errorf("dbsync not enabled")
+	}
+	ch, err := m.store.EnsureSystemDefaultChannel(opts)
+	if err != nil {
+		return Channel{}, err
+	}
+	if err := m.StartChannel(ch.ID); err != nil {
+		return ch, fmt.Errorf("start default channel: %w", err)
+	}
+	if updated, err := m.store.GetChannel(ch.ID); err == nil {
+		return *updated, nil
+	}
+	ch.Enabled = true
+	return ch, nil
+}
diff --git a/platform/internal/dbsync/manager.go b/platform/internal/dbsync/manager.go
index 38b960f..8e07500 100644
--- a/platform/internal/dbsync/manager.go
+++ b/platform/internal/dbsync/manager.go
@@ -28,7 +28,8 @@ func (m *Manager) StartAll(ctx context.Context) {
 		return
 	}
 	for _, ch := range list {
-		if ch.Enabled {
+		// 公司默认同步通道默认运行中（即使历史记录曾为 Enabled=false）
+		if ch.Enabled || ch.IsSystemDefault {
 			_ = m.StartChannel(ch.ID)
 		}
 	}
diff --git a/platform/internal/logic/applogic/agent_sync_bind.go b/platform/internal/logic/applogic/agent_sync_bind.go
index 4b21f81..60afef0 100644
--- a/platform/internal/logic/applogic/agent_sync_bind.go
+++ b/platform/internal/logic/applogic/agent_sync_bind.go
@@ -63,7 +63,7 @@ func (l *AgentAdminLogic) ensureAgentSyncBind(acc *agentstore.Account) (*agentst
 	if driver == "" {
 		driver = dbsync.DriverPostgres
 	}
-	ch, err := l.svcCtx.DBSync.Store().EnsureSystemDefaultChannel(dbsync.DefaultChannelOpts{
+	ch, err := l.svcCtx.DBSync.EnsureAndStartSystemDefaultChannel(dbsync.DefaultChannelOpts{
 		TenantID:     acc.TenantID,
 		AgentID:      acc.AgentID,
 		Name:         fmt.Sprintf("默认同步 · %s", acc.Name),
diff --git a/platform/internal/logic/applogic/bind_flow.go b/platform/internal/logic/applogic/bind_flow.go
index 955d572..3579d22 100644
--- a/platform/internal/logic/applogic/bind_flow.go
+++ b/platform/internal/logic/applogic/bind_flow.go
@@ -57,6 +57,7 @@ func (l *AuthLogic) CreateBindCode(req BindCodeCreateReq) (*bindcodestore.BindCo
 			if online == "" {
 				online = dbsync.ResolveOnlineDBID("", ch.ID)
 			}
+			_ = l.svcCtx.DBSync.StartChannel(ch.ID) // 已有默认同步通道也保持运行中
 		} else {
 			// 尝试创建默认同步通道
 			cfg := l.svcCtx.Config.DBSync
@@ -64,7 +65,7 @@ func (l *AuthLogic) CreateBindCode(req BindCodeCreateReq) (*bindcodestore.BindCo
 			if driver == "" {
 				driver = dbsync.DriverPostgres
 			}
-			saved, err := l.svcCtx.DBSync.Store().EnsureSystemDefaultChannel(dbsync.DefaultChannelOpts{
+			saved, err := l.svcCtx.DBSync.EnsureAndStartSystemDefaultChannel(dbsync.DefaultChannelOpts{
 				TenantID:     tid,
 				RemoteDriver: driver,
 				RemoteDSN:    strings.TrimSpace(cfg.DefaultRemoteDSN),
diff --git a/platform/internal/logic/applogic/yuheng_ticket.go b/platform/internal/logic/applogic/yuheng_ticket.go
index 24dee7b..0064732 100644
--- a/platform/internal/logic/applogic/yuheng_ticket.go
+++ b/platform/internal/logic/applogic/yuheng_ticket.go
@@ -160,7 +160,7 @@ func (l *AuthLogic) bindUserHostSync(u *userstore.User, hostKey, name, localID,
 	if driver == "" {
 		driver = dbsync.DriverPostgres
 	}
-	ch, err := l.svcCtx.DBSync.Store().EnsureSystemDefaultChannel(dbsync.DefaultChannelOpts{
+	ch, err := l.svcCtx.DBSync.EnsureAndStartSystemDefaultChannel(dbsync.DefaultChannelOpts{
 		TenantID:     u.TenantID,
 		RemoteDriver: driver,
 		RemoteDSN:    strings.TrimSpace(cfg.DefaultRemoteDSN),
diff --git a/web/src/SyncPage.tsx b/web/src/SyncPage.tsx
index b5c2787..507133e 100644
--- a/web/src/SyncPage.tsx
+++ b/web/src/SyncPage.tsx
@@ -348,10 +348,21 @@ export function SyncPage(props: {
     setBusy(true);
     try {
       const body = toChannelBody(v, editing?.id);
-      if (editing) await updateSyncChannel(session, editing.id, body);
-      else await createSyncChannel(session, body);
+      const saved = editing
+        ? await updateSyncChannel(session, editing.id, body)
+        : await createSyncChannel(session, body);
+      const id = (saved as SyncChannel)?.id || editing?.id;
+      if (id) {
+        try {
+          await startSyncChannel(session, id);
+          setInfo("同步通道已保存并启动");
+        } catch {
+          setInfo("同步通道已保存（启动失败时可手动点「启动」）");
+        }
+      } else {
+        setInfo("同步通道已保存");
+      }
       setOpen(false);
-      setInfo("同步通道已保存");
       await refresh();
     } catch (e: any) {
       message.error(e.message || String(e));