diff --git a/backend/services/deploy-mining.sh b/backend/services/deploy-mining.sh
index b1f34862..084024d9 100755
--- a/backend/services/deploy-mining.sh
+++ b/backend/services/deploy-mining.sh
@@ -271,6 +271,8 @@ load_env() {
         export KAFKA_BROKERS="${KAFKA_BROKERS:-192.168.1.111:9093}"
         export REDIS_HOST="${REDIS_HOST:-redis-2}"
         export RWA_NETWORK_NAME="rwa-2-network"
+        # Debezium outbox connector 连接的数据库主机名 (standalone 用 postgres-2)
+        export DEBEZIUM_DB_HOST="postgres-2"
         # MPC system 在 1.0 服务器上
         export MPC_ACCOUNT_SERVICE_URL="${MPC_ACCOUNT_SERVICE_URL:-http://192.168.1.111:4000}"
 
diff --git a/backend/services/scripts/debezium/auth-outbox-connector.json b/backend/services/scripts/debezium/auth-outbox-connector.json
index 5cfa7888..0fa95a94 100644
--- a/backend/services/scripts/debezium/auth-outbox-connector.json
+++ b/backend/services/scripts/debezium/auth-outbox-connector.json
@@ -4,10 +4,10 @@
     "connector.class": "io.debezium.connector.postgresql.PostgresConnector",
     "tasks.max": "1",
 
-    "database.hostname": "postgres",
+    "database.hostname": "${DEBEZIUM_DB_HOST:-postgres}",
     "database.port": "5432",
-    "database.user": "rwa_user",
-    "database.password": "your_secure_password_here",
+    "database.user": "${POSTGRES_USER:-rwa_user}",
+    "database.password": "${POSTGRES_PASSWORD:-your_secure_password_here}",
     "database.dbname": "rwa_auth",
 
     "topic.prefix": "cdc.auth",
diff --git a/backend/services/scripts/debezium/contribution-outbox-connector.json b/backend/services/scripts/debezium/contribution-outbox-connector.json
index f3ba6b77..c154d66f 100644
--- a/backend/services/scripts/debezium/contribution-outbox-connector.json
+++ b/backend/services/scripts/debezium/contribution-outbox-connector.json
@@ -4,10 +4,10 @@
     "connector.class": "io.debezium.connector.postgresql.PostgresConnector",
     "tasks.max": "1",
 
-    "database.hostname": "postgres",
+    "database.hostname": "${DEBEZIUM_DB_HOST:-postgres}",
     "database.port": "5432",
-    "database.user": "rwa_user",
-    "database.password": "your_secure_password_here",
+    "database.user": "${POSTGRES_USER:-rwa_user}",
+    "database.password": "${POSTGRES_PASSWORD:-your_secure_password_here}",
     "database.dbname": "rwa_contribution",
 
     "topic.prefix": "cdc.contribution",
diff --git a/backend/services/scripts/debezium/mining-outbox-connector.json b/backend/services/scripts/debezium/mining-outbox-connector.json
index d8f521e0..20b5e502 100644
--- a/backend/services/scripts/debezium/mining-outbox-connector.json
+++ b/backend/services/scripts/debezium/mining-outbox-connector.json
@@ -4,10 +4,10 @@
     "connector.class": "io.debezium.connector.postgresql.PostgresConnector",
     "tasks.max": "1",
 
-    "database.hostname": "postgres",
+    "database.hostname": "${DEBEZIUM_DB_HOST:-postgres}",
     "database.port": "5432",
-    "database.user": "rwa_user",
-    "database.password": "your_secure_password_here",
+    "database.user": "${POSTGRES_USER:-rwa_user}",
+    "database.password": "${POSTGRES_PASSWORD:-your_secure_password_here}",
     "database.dbname": "rwa_mining",
 
     "topic.prefix": "cdc.mining",
diff --git a/backend/services/scripts/debezium/mining-wallet-outbox-connector.json b/backend/services/scripts/debezium/mining-wallet-outbox-connector.json
index 52b04f92..406885d8 100644
--- a/backend/services/scripts/debezium/mining-wallet-outbox-connector.json
+++ b/backend/services/scripts/debezium/mining-wallet-outbox-connector.json
@@ -4,10 +4,10 @@
     "connector.class": "io.debezium.connector.postgresql.PostgresConnector",
     "tasks.max": "1",
 
-    "database.hostname": "postgres",
+    "database.hostname": "${DEBEZIUM_DB_HOST:-postgres}",
     "database.port": "5432",
-    "database.user": "rwa_user",
-    "database.password": "your_secure_password_here",
+    "database.user": "${POSTGRES_USER:-rwa_user}",
+    "database.password": "${POSTGRES_PASSWORD:-your_secure_password_here}",
     "database.dbname": "rwa_mining_wallet",
 
     "topic.prefix": "cdc.mining-wallet",
diff --git a/backend/services/scripts/debezium/trading-outbox-connector.json b/backend/services/scripts/debezium/trading-outbox-connector.json
index 47f4a5ee..316ee8d7 100644
--- a/backend/services/scripts/debezium/trading-outbox-connector.json
+++ b/backend/services/scripts/debezium/trading-outbox-connector.json
@@ -4,10 +4,10 @@
     "connector.class": "io.debezium.connector.postgresql.PostgresConnector",
     "tasks.max": "1",
 
-    "database.hostname": "postgres",
+    "database.hostname": "${DEBEZIUM_DB_HOST:-postgres}",
     "database.port": "5432",
-    "database.user": "rwa_user",
-    "database.password": "your_secure_password_here",
+    "database.user": "${POSTGRES_USER:-rwa_user}",
+    "database.password": "${POSTGRES_PASSWORD:-your_secure_password_here}",
     "database.dbname": "rwa_trading",
 
     "topic.prefix": "cdc.trading",