diff --git a/deployment/helm/datamate/values.yaml b/deployment/helm/datamate/values.yaml
index 55bb1b27..921ae3ad 100644
--- a/deployment/helm/datamate/values.yaml
+++ b/deployment/helm/datamate/values.yaml
@@ -163,18 +163,18 @@ runtime:
     - --port
     - "8081"
   env: &runtimeEnv
-    - name: MYSQL_HOST
+    - name: PG_HOST
       value: "datamate-database"
-    - name: MYSQL_PORT
-      value: "3306"
-    - name: MYSQL_USER
-      value: "root"
-    - name: MYSQL_PASSWORD
+    - name: PG_PORT
+      value: "5432"
+    - name: PG_USER
+      value: "postgres"
+    - name: PG_PASSWORD
       valueFrom:
         secretKeyRef:
           name: datamate-conf
           key: DB_PASSWORD
-    - name: MYSQL_DATABASE
+    - name: PG_DATABASE
       value: "datamate"
   volumes:
     - *datasetVolume
diff --git a/runtime/python-executor/datamate/sql_manager/sql_manager.py b/runtime/python-executor/datamate/sql_manager/sql_manager.py
index 14deae64..087264e5 100644
--- a/runtime/python-executor/datamate/sql_manager/sql_manager.py
+++ b/runtime/python-executor/datamate/sql_manager/sql_manager.py
@@ -23,7 +23,7 @@ def create_connect(max_retries=5, base_delay=1):
             drivername="postgresql+psycopg2",  # 核心修改：使用 pg 驱动
             username=os.getenv("PG_USER", "postgres"), # 建议修改环境变量名
             password=os.getenv("PG_PASSWORD", "password"),
-            host=os.getenv("PG_HOST", "postgres"),
+            host=os.getenv("PG_HOST", "datamate-database"),
             port=int(os.getenv("PG_PORT", 5432)), # 修改默认端口为 5432
             database=os.getenv("PG_DATABASE", "datamate"),
         )