diff --git a/backend/services/docker-compose.yml b/backend/services/docker-compose.yml
index 045f4ee3..4b239d90 100644
--- a/backend/services/docker-compose.yml
+++ b/backend/services/docker-compose.yml
@@ -578,7 +578,7 @@ services:
       - KAFKA_CLIENT_ID=blockchain-service
       - KAFKA_GROUP_ID=blockchain-service-group
       # 网络模式: mainnet 或 testnet
-      - NETWORK_MODE=${NETWORK_MODE:-mainnet}
+      - NETWORK_MODE=testnet
       # 主网配置 (NETWORK_MODE=mainnet 时使用)
       # - KAVA_RPC_URL=https://evm.kava.io
       # - KAVA_CHAIN_ID=2222