diff --git a/python/paddle_fl/mpc/examples/mnist_demo/run_standalone.sh b/python/paddle_fl/mpc/examples/mnist_demo/run_standalone.sh
index dd61a1f4221916bef63f3389b6a00f05b98fb75f..244f37a6472f8705f29a72302bf632d731ac97ea 100755
--- a/python/paddle_fl/mpc/examples/mnist_demo/run_standalone.sh
+++ b/python/paddle_fl/mpc/examples/mnist_demo/run_standalone.sh
@@ -12,7 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
+#!/bin/bash
+#
 # A tools to faciliate the parallel running of fluid_encrypted test scrips.
 # A test script is EXPECTED to accepted arguments in the following format:
 #
diff --git a/python/paddle_fl/mpc/examples/uci_demo/run_standalone.sh b/python/paddle_fl/mpc/examples/uci_demo/run_standalone.sh
index 7819af2db4f2d2d4bbd254f1f6c92bd116c76c1f..ce5993e086e028021ada5b5942efde9432b55305 100755
--- a/python/paddle_fl/mpc/examples/uci_demo/run_standalone.sh
+++ b/python/paddle_fl/mpc/examples/uci_demo/run_standalone.sh
@@ -12,7 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
+#!/bin/bash
+#
 # A tools to faciliate the parallel running of fluid_encrypted test scrips.
 # A test script is EXPECTED to accepted arguments in the following format:
 #