diff --git a/fleetrec/core/utils/envs.py b/fleetrec/core/utils/envs.py
index 991ede19190d57f906d0d561cee01be929b935bd..69d723c76bc7353e7e9febdf8864c8b7ce0b2923 100644
--- a/fleetrec/core/utils/envs.py
+++ b/fleetrec/core/utils/envs.py
@@ -44,7 +44,7 @@ def flatten_environs(envs):
 
 def set_runtime_environs(environs):
     for k, v in environs.items():
-        os.environ[k] = v
+        os.environ[k] = str(v)
 
 def get_runtime_environ(key):
     return os.getenv(key, None)
diff --git a/readme.md b/readme.md
index cf3e42130a394ce38a867ab56db6d7b00ad08dce..5beb6ea63254ef9024dfe798f871bf7d1f3a3fde 100644
--- a/readme.md
+++ b/readme.md
@@ -28,9 +28,7 @@ cd FleetRec
 
 python -m fleetrec.run \
        -m fleetrec/examples/ctr-dnn_train.yaml \
-       -e single \
-       -ex fleetrec/examples/runtime.yaml
-
+       -e single 
 ```
 
 ### 本地模拟分布式训练
@@ -40,9 +38,7 @@ cd FleetRec
 
 python -m fleetrec.run \
        -m fleetrec/examples/ctr-dnn_train.yaml \
-       -e local_cluster \
-       -ex fleetrec/examples/runtime.yaml
-
+       -e local_cluster 
 ```
 
 ### 集群提交分布式训练<需要用户预先配置好集群环境，本提交命令不包含提交客户端>
@@ -52,9 +48,7 @@ cd FleetRec
 
 python -m fleetrec.run \
        -m fleetrec/examples/ctr-dnn_train.yaml \
-       -e cluster \
-       -ex fleetrec/examples/runtime.yaml
-
+       -e cluster
 ```
 
 更多用户文档及二次开发文档，敬请期待。
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