diff --git a/pipeline_service/init.py b/pipeline_service/init.py
index db25766..fe2c469 100644
--- a/pipeline_service/init.py
+++ b/pipeline_service/init.py
@@ -475,6 +475,11 @@ async def skill_import_git(repo_url: str, skills_dir: str = 'skills'):
 
 def load_pipeline_service():
     """注册所有函数到 ServerEnv。任何宿主应用调用此函数即可使用产线引擎。"""
+    import os as _os
+    # 运行模式（进程级，由 start.sh 设 PIPELINE_MODE）：
+    #   all(默认) = HTTP + poller；web = 仅 HTTP；worker = 仅 poller（分布式多主机 worker 节点）
+    _run_mode = (_os.environ.get('PIPELINE_MODE', 'all') or 'all').strip().lower()
+    _run_pollers = _run_mode in ('all', 'worker')  # web 模式不注册 poller
     env = ServerEnv()
 
     # Task lifecycle
@@ -642,7 +647,7 @@ def load_pipeline_service():
         debug("agent poller started")
 
     from ahserver.configuredServer import add_startup
-    add_startup(_role_poller)
+    add_startup(_role_poller) if _run_pollers else None
 
     # PM review poller (v3.3.0): auto-dispatch review-state tasks to PM agent
     async def _pm_poller(app):
@@ -692,7 +697,7 @@ def load_pipeline_service():
         asyncio.create_task(_pm_poll_loop())
         debug("pm poller started")
 
-    add_startup(_pm_poller)
+    add_startup(_pm_poller) if _run_pollers else None
 
     # QC review poller: auto-dispatch qc_review-state tasks to QC agent（合规/质量门禁）
     async def _qc_poller(app):
@@ -742,7 +747,7 @@ def load_pipeline_service():
         asyncio.create_task(_qc_poll_loop())
         debug("qc poller started")
 
-    add_startup(_qc_poller)
+    add_startup(_qc_poller) if _run_pollers else None
 
     # Failed task poller: 失败任务自动重跑(最多3次)，超限报故障给用户
     async def _failed_poller(app):
@@ -785,7 +790,7 @@ def load_pipeline_service():
         asyncio.create_task(_fd_poll_loop())
         debug("failed poller started")
 
-    add_startup(_failed_poller)
+    add_startup(_failed_poller) if _run_pollers else None
 
     # 铁律：运行期不做任何 schema 变更。v2 引擎的建表/加列已全部迁到
     # 部署期 scripts/create_tables.py（build.sh 会调用），此处不再启动时建表。