diff --git a/apps/api/app/api/routes/auth.py b/apps/api/app/api/routes/auth.py
index 44cdaa6b8..5403c6809 100755
--- a/apps/api/app/api/routes/auth.py
+++ b/apps/api/app/api/routes/auth.py
@@ -13,7 +13,7 @@ from typing import Optional
 import jwt
 from app.auth import AuthenticatedUser, blacklist_token, get_current_user
 from app.config import settings
-from app.dependencies import get_auth_email_service, get_auth_session_store, get_user_repository
+from app.dependencies import get_auth_email_service, get_auth_session_store, get_db_session, get_user_repository
 from fastapi import APIRouter, Depends, Header, HTTPException, Request, status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 from pydantic import BaseModel, EmailStr, field_validator
@@ -126,6 +126,7 @@ async def register(
     request: RegisterRequest,
     user_repository: UserRepository = Depends(get_user_repository),
     email_service=Depends(get_auth_email_service),
+    db=Depends(get_db_session),
 ) -> RegisterResponse:
     use_case = RegisterUserUseCase(
         user_repository=user_repository,
@@ -143,6 +144,22 @@ async def register(
     if error or response is None:
         raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=_translate_auth_error(error))
 
+    # 新用户注册赠送 50 积分（失败不影响注册）
+    if settings.points_enabled:
+        try:
+            from packages.domain.points_service import PointsService
+            _svc = PointsService()
+            _svc.add_points(
+                user_id=response.user_id,
+                amount=50,
+                source="task_reward",
+                db=db,
+                description="新用户注册赠送",
+            )
+        except Exception as _bonus_err:
+            import logging
+            logging.getLogger(__name__).warning("注册送积分失败: user_id=%s err=%s", response.user_id, _bonus_err)
+
     return RegisterResponse(
         user_id=response.user_id,
         email=response.email,
diff --git a/tests/unit/test_auth_register_points.py b/tests/unit/test_auth_register_points.py
new file mode 100644
index 000000000..8ca54d5d2
--- /dev/null
+++ b/tests/unit/test_auth_register_points.py
@@ -0,0 +1,111 @@
+"""注册送积分单元测试 (#1895 P2 step 3)"""
+
+from __future__ import annotations
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+
+@pytest.fixture
+def mock_settings(monkeypatch):
+    """默认关闭 points_enabled，不影响现有用例。"""
+    from app.config import settings
+
+    monkeypatch.setattr(settings, "points_enabled", False)
+    return settings
+
+
+class TestRegisterBonusPoints:
+    @pytest.mark.asyncio
+    async def test_bonus_when_enabled(self, mock_settings):
+        """开启积分时注册成功送50分。"""
+        from app.api.routes import auth
+        from app.api.routes.auth import RegisterRequest
+
+        mock_settings.points_enabled = True
+
+        mock_uc = MagicMock()
+        mock_resp = MagicMock()
+        mock_resp.user_id = "new-user-1"
+        mock_resp.email = "n***@example.com"
+        mock_resp.username = "newuser"
+        mock_resp.display_name = "New User"
+        mock_uc.execute.return_value = (mock_resp, None)
+
+        mock_svc = MagicMock()
+
+        def _mock_uc_cls(*args, **kwargs):
+            return mock_uc
+
+        db = MagicMock()
+
+        with (
+            patch("app.api.routes.auth.RegisterUserUseCase", side_effect=_mock_uc_cls),
+            patch("packages.domain.points_service.PointsService", return_value=mock_svc),
+        ):
+            req = RegisterRequest(email="n***@example.com", password="Secret123!", username="newuser")
+            resp = await auth.register(request=req, user_repository=MagicMock(), email_service=MagicMock(), db=db)
+            assert resp.user_id == "new-user-1"
+            mock_svc.add_points.assert_called_once()
+            call_kwargs = mock_svc.add_points.call_args.kwargs
+            assert call_kwargs["user_id"] == "new-user-1"
+            assert call_kwargs["amount"] == 50
+            assert call_kwargs["source"] == "task_reward"
+
+    @pytest.mark.asyncio
+    async def test_no_bonus_when_disabled(self, mock_settings):
+        """关闭积分时不送分。"""
+        from app.api.routes import auth
+        from app.api.routes.auth import RegisterRequest
+
+        mock_uc = MagicMock()
+        mock_resp = MagicMock()
+        mock_resp.user_id = "new-user-2"
+        mock_resp.email = "n***@example.com"
+        mock_resp.username = "newuser2"
+        mock_resp.display_name = "New User 2"
+        mock_uc.execute.return_value = (mock_resp, None)
+
+        def _mock_uc_cls(*args, **kwargs):
+            return mock_uc
+
+        db = MagicMock()
+        with (
+            patch("app.api.routes.auth.RegisterUserUseCase", side_effect=_mock_uc_cls),
+            patch("packages.domain.points_service.PointsService") as MockSvc,
+        ):
+            req = RegisterRequest(email="n***@example.com", password="Secret123!", username="newuser2")
+            resp = await auth.register(request=req, user_repository=MagicMock(), email_service=MagicMock(), db=db)
+            MockSvc.assert_not_called()
+            assert resp.user_id == "new-user-2"
+
+    @pytest.mark.asyncio
+    async def test_bonus_failure_does_not_break_register(self, mock_settings):
+        """送积分失败不应影响注册流程。"""
+        from app.api.routes import auth
+        from app.api.routes.auth import RegisterRequest
+
+        mock_settings.points_enabled = True
+        mock_uc = MagicMock()
+        mock_resp = MagicMock()
+        mock_resp.user_id = "new-user-3"
+        mock_resp.email = "n***@example.com"
+        mock_resp.username = "newuser3"
+        mock_resp.display_name = "New User 3"
+        mock_uc.execute.return_value = (mock_resp, None)
+
+        mock_svc = MagicMock()
+        mock_svc.add_points.side_effect = Exception("DB error")
+
+        def _mock_uc_cls(*args, **kwargs):
+            return mock_uc
+
+        db = MagicMock()
+        with (
+            patch("app.api.routes.auth.RegisterUserUseCase", side_effect=_mock_uc_cls),
+            patch("packages.domain.points_service.PointsService", return_value=mock_svc),
+        ):
+            req = RegisterRequest(email="n***@example.com", password="Secret123!", username="newuser3")
+            resp = await auth.register(request=req, user_repository=MagicMock(), email_service=MagicMock(), db=db)
+            assert resp.user_id == "new-user-3"
diff --git a/tests/unit/test_generation_tasks.py b/tests/unit/test_generation_tasks.py
index 239e1480d..e6c8fb3c0 100755
--- a/tests/unit/test_generation_tasks.py
+++ b/tests/unit/test_generation_tasks.py
@@ -19,6 +19,13 @@ from packages.application.generation_tasks import (
 from packages.domain import GenerationTask
 
 
+@pytest.fixture(autouse=True)
+def _disable_points_gate(monkeypatch):
+    """默认关闭积分闸门，避免影响既有用例。"""
+    monkeypatch.setattr(_pg_module, "_points_gate_enabled", lambda: False)
+    yield
+
+
 @pytest.fixture(autouse=True)
 def _disable_points_gate(monkeypatch):
     """默认关闭积分闸门，避免影响既有用例。"""