diff --git a/main.py b/main.py
index 357082c..8be540d 100644
--- a/main.py
+++ b/main.py
@@ -633,7 +633,41 @@ def send_tg_message(message):
         telegram_chat_id=TG_CHAT_ID,
         webhook_url=_NOTIFICATION_WEBHOOK_URL,
     )
-    sender(message)
+    sender(_with_platform_notification_prefix(message))
+
+
+def _platform_notification_prefix() -> str:
+    runtime_target = getattr(RUNTIME_SETTINGS, "runtime_target", None)
+    account_selector = getattr(runtime_target, "account_selector", None) or ()
+    for selector in account_selector:
+        label = _normalize_account_prefix_label(selector)
+        if label:
+            return f"[{label}]"
+    raw_scope = (
+        getattr(runtime_target, "account_scope", None)
+        or ACCOUNT_GROUP
+    )
+    label = _normalize_account_prefix_label(raw_scope)
+    if not label:
+        return ""
+    return f"[{label}]"
+
+
+def _normalize_account_prefix_label(value: object) -> str:
+    label = str(value or "").strip().upper()
+    if not label or label in {"DEFAULT", "LIVE", "US"}:
+        return ""
+    if label.startswith("LIVE-U") and len(label) > len("LIVE-U"):
+        return label.removeprefix("LIVE-")
+    return label
+
+
+def _with_platform_notification_prefix(message: str) -> str:
+    prefix = _platform_notification_prefix()
+    text = str(message or "")
+    if not prefix or text.lstrip().startswith(prefix):
+        return text
+    return f"{prefix} {text}"
 
 
 def publish_notification(*, detailed_text, compact_text):
@@ -696,7 +730,7 @@ def _notify_runtime_error(exc: Exception, *, route_label: str | None = None) ->
     message = _runtime_error_notification_message(exc, route_label=route_label)
     for token, chat_id in targets:
         send_telegram_message(
-            message,
+            _with_platform_notification_prefix(message),
             token=token,
             chat_id=chat_id,
             requests_module=requests,
diff --git a/tests/test_request_handling.py b/tests/test_request_handling.py
index faa0294..91b0c97 100644
--- a/tests/test_request_handling.py
+++ b/tests/test_request_handling.py
@@ -1,3 +1,4 @@
+import json
 import types
 
 from application.cycle_result import StrategyCycleResult
@@ -29,6 +30,35 @@ def test_health_route_returns_ok(strategy_module):
     assert body == "OK"
 
 
+def test_platform_notification_prefix_stays_empty_for_default_account(strategy_module):
+    assert strategy_module._platform_notification_prefix() == ""
+    assert strategy_module._with_platform_notification_prefix("hello") == "hello"
+
+
+def test_platform_notification_prefix_uses_ibkr_account_scope(strategy_module_factory):
+    module = strategy_module_factory(
+        ACCOUNT_GROUP="live-u1234567",
+        IB_ACCOUNT_GROUP_CONFIG_JSON=(
+            '{"groups":{"live-u1234567":{"ib_gateway_instance_name":"127.0.0.1",'
+            '"ib_gateway_mode":"live","ib_client_id":1,"account_ids":["U1234567"]}}}'
+        ),
+        RUNTIME_TARGET_JSON=json.dumps(
+            {
+                "platform_id": "ibkr",
+                "strategy_profile": "global_etf_rotation",
+                "dry_run_only": False,
+                "execution_mode": "live",
+                "account_selector": ["U1234567"],
+                "account_scope": "live-u1234567",
+            },
+            separators=(",", ":"),
+        ),
+    )
+
+    assert module._platform_notification_prefix() == "[U1234567]"
+    assert module._with_platform_notification_prefix("hello") == "[U1234567] hello"
+
+
 def test_handle_request_get_returns_safe_message(strategy_module, monkeypatch):
     def fail_if_called():
         raise AssertionError("GET should not execute strategy")
@@ -755,3 +785,45 @@ def fake_post(_url, *, json, timeout):
     assert "IBKR 策略运行失败" in text
     assert "账户组:" in text
     assert "错误: RuntimeError: boom" in text
+
+
+def test_handle_request_runtime_error_fallback_prefixes_account_scope(strategy_module_factory, monkeypatch):
+    strategy_module = strategy_module_factory(
+        ACCOUNT_GROUP="live-u1234567",
+        IB_ACCOUNT_GROUP_CONFIG_JSON=(
+            '{"groups":{"live-u1234567":{"ib_gateway_instance_name":"127.0.0.1",'
+            '"ib_gateway_mode":"live","ib_client_id":1,"account_ids":["U1234567"]}}}'
+        ),
+        RUNTIME_TARGET_JSON=json.dumps(
+            {
+                "platform_id": "ibkr",
+                "strategy_profile": "global_etf_rotation",
+                "dry_run_only": False,
+                "execution_mode": "live",
+                "account_selector": ["U1234567"],
+                "account_scope": "live-u1234567",
+            },
+            separators=(",", ":"),
+        ),
+    )
+    sent_payloads = []
+
+    class FakeResponse:
+        status_code = 200
+        text = "ok"
+
+    def fake_post(_url, *, json, timeout):
+        sent_payloads.append((json, timeout))
+        return FakeResponse()
+
+    monkeypatch.setattr(strategy_module, "_handle_request", lambda: (_ for _ in ()).throw(RuntimeError("boom")))
+    monkeypatch.setattr(strategy_module, "TG_TOKEN", "token-1")
+    monkeypatch.setattr(strategy_module, "TG_CHAT_ID", "chat-1")
+    monkeypatch.setattr(strategy_module.requests, "post", fake_post)
+
+    with strategy_module.app.test_request_context("/run", method="POST"):
+        body, status = strategy_module.handle_request()
+
+    assert status == 500
+    assert body == "Error"
+    assert sent_payloads[0][0]["text"].startswith("[U1234567] IBKR strategy run failed")