diff --git a/src/data/__init__.py b/src/data/__init__.py
index ab47151..d094261 100644
--- a/src/data/__init__.py
+++ b/src/data/__init__.py
@@ -15,6 +15,14 @@ from src.data.db_manager import (
     get_table_info,
     sync_table,
 )
+from src.data.catalog import (
+    DatabaseCatalog,
+    SQLQueryBuilder,
+    build_context_lazyframe,
+    TableMetadata,
+    FieldMapping,
+    TableFrequency,
+)
 
 __all__ = [
     # Configuration
@@ -36,4 +44,11 @@ __all__ = [
     "ensure_table",
     "get_table_info",
     "sync_table",
+    # Data catalog
+    "DatabaseCatalog",
+    "SQLQueryBuilder",
+    "build_context_lazyframe",
+    "TableMetadata",
+    "FieldMapping",
+    "TableFrequency",
 ]
diff --git a/src/data/data_router.py b/src/data/catalog.py
similarity index 100%
rename from src/data/data_router.py
rename to src/data/catalog.py
diff --git a/tests/test_factor_integration.py b/tests/test_factor_integration.py
index 29ee34b..eb1dcb0 100644
--- a/tests/test_factor_integration.py
+++ b/tests/test_factor_integration.py
@@ -15,7 +15,7 @@ from datetime import datetime
 
 import polars as pl
 
-from src.data.data_router import DatabaseCatalog
+from src.data.catalog import DatabaseCatalog
 from src.factors.engine import FactorEngine
 from src.factors.api import close, open, ts_mean, cs_rank
 
@@ -215,7 +215,7 @@ def run_factor_integration_test():
     print("=" * 80)
 
     print("\n[4.1] 重新构建 Context LazyFrame 并打印前 5 行...")
-    from src.data.data_router import build_context_lazyframe
+    from src.data.catalog import build_context_lazyframe
 
     context_lf = build_context_lazyframe(
         required_fields=["close", "open"],