diff --git a/spark_executor/tools/connections.py b/spark_executor/tools/connections.py
new file mode 100644
index 0000000..ccff910
--- /dev/null
+++ b/spark_executor/tools/connections.py
@@ -0,0 +1,47 @@
+# coding=utf-8
+"""
+@Time   :2026/6/24
+@Author :tao.chen
+"""
+from common.logging import logger
+from spark_executor.core.connection_store import ConnectionStore, store
+from spark_executor.models import Connection
+
+
+def save_connection(
+    *,
+    name: str,
+    master: str,
+    deploy_mode: str = "cluster",
+    yarn_rm_url: str | None = None,
+    spark_conf: dict[str, str] | None = None,
+) -> dict[str, str]:
+    conn = Connection(
+        name=name,
+        master=master,
+        deploy_mode=deploy_mode,
+        yarn_rm_url=yarn_rm_url,
+        spark_conf=spark_conf or {},
+    )
+    store.save(conn)
+    logger.info(f"save_connection name={name} master={master}")
+    return {"name": name, "status": "SAVED"}
+
+
+def list_connections() -> list[dict[str, object]]:
+    return [c.model_dump() for c in store.list_all()]
+
+
+def get_connection(name: str) -> dict[str, object]:
+    conn = store.get(name)
+    if conn is None:
+        raise KeyError(f"Unknown connection: {name}")
+    return conn.model_dump()
+
+
+def delete_connection(name: str) -> dict[str, str]:
+    removed = store.delete(name)
+    if not removed:
+        raise KeyError(f"Unknown connection: {name}")
+    logger.info(f"delete_connection name={name}")
+    return {"name": name, "status": "DELETED"}
diff --git a/tests/unit/test_connection_tools.py b/tests/unit/test_connection_tools.py
new file mode 100644
index 0000000..4307622
--- /dev/null
+++ b/tests/unit/test_connection_tools.py
@@ -0,0 +1,85 @@
+# coding=utf-8
+from pathlib import Path
+
+import pytest
+
+from spark_executor.core import connection_store
+from spark_executor.tools import connections
+
+
+@pytest.fixture(autouse=True)
+def _fresh_store(tmp_path: Path, monkeypatch):
+    monkeypatch.setattr(connection_store, "DEFAULT_DATA_DIR", str(tmp_path))
+    monkeypatch.setattr(connection_store, "store", connection_store.ConnectionStore())
+    monkeypatch.setattr(connections, "store", connection_store.store)
+    return connection_store.store
+
+
+# --- save_connection ---
+
+def test_save_connection(_fresh_store):
+    out = connections.save_connection(name="prod", master="yarn")
+    assert out == {"name": "prod", "status": "SAVED"}
+    assert _fresh_store.get("prod") is not None
+
+
+def test_save_connection_upserts(_fresh_store):
+    connections.save_connection(name="prod", master="yarn")
+    connections.save_connection(name="prod", master="spark://new:7077", deploy_mode="client")
+    assert _fresh_store.get("prod").master == "spark://new:7077"
+    assert _fresh_store.get("prod").deploy_mode == "client"
+
+
+def test_save_connection_with_spark_conf(_fresh_store):
+    connections.save_connection(
+        name="dev",
+        master="yarn",
+        spark_conf={"spark.sql.shuffle.partitions": "200"},
+    )
+    assert _fresh_store.get("dev").spark_conf["spark.sql.shuffle.partitions"] == "200"
+
+
+# --- list_connections ---
+
+def test_list_connections_empty(_fresh_store):
+    assert connections.list_connections() == []
+
+
+def test_list_connections_returns_all_saved(_fresh_store):
+    connections.save_connection(name="a", master="yarn")
+    connections.save_connection(name="b", master="spark://m:7077", deploy_mode="client")
+    out = connections.list_connections()
+    names = {c["name"] for c in out}
+    assert names == {"a", "b"}
+    masters = {c["name"]: c["master"] for c in out}
+    assert masters == {"a": "yarn", "b": "spark://m:7077"}
+
+
+# --- get_connection ---
+
+def test_get_connection_returns_dict(_fresh_store):
+    connections.save_connection(name="prod", master="yarn", deploy_mode="cluster")
+    out = connections.get_connection("prod")
+    assert out["name"] == "prod"
+    assert out["master"] == "yarn"
+    assert out["deploy_mode"] == "cluster"
+    assert out["yarn_rm_url"] is None
+    assert out["spark_conf"] == {}
+
+
+def test_get_connection_unknown_raises(_fresh_store):
+    with pytest.raises(KeyError):
+        connections.get_connection("missing")
+
+
+# --- delete_connection ---
+
+def test_delete_connection_returns_status(_fresh_store):
+    connections.save_connection(name="prod", master="yarn")
+    assert connections.delete_connection("prod") == {"name": "prod", "status": "DELETED"}
+    assert _fresh_store.get("prod") is None
+
+
+def test_delete_connection_unknown_raises(_fresh_store):
+    with pytest.raises(KeyError):
+        connections.delete_connection("missing")