diff --git a/dolphinscheduler-spi/src/main/java/org/apache/dolphinscheduler/spi/task/AbstractTask.java b/dolphinscheduler-spi/src/main/java/org/apache/dolphinscheduler/spi/task/AbstractTask.java
index a94adffb37..b9c2632e5e 100644
--- a/dolphinscheduler-spi/src/main/java/org/apache/dolphinscheduler/spi/task/AbstractTask.java
+++ b/dolphinscheduler-spi/src/main/java/org/apache/dolphinscheduler/spi/task/AbstractTask.java
@@ -79,9 +79,6 @@ public abstract class AbstractTask {
         return null;
     }
 
-    public void setCommand(String command) throws Exception {
-
-    }
 
     /**
      * task handle
diff --git a/dolphinscheduler-task-plugin/dolphinscheduler-task-api/src/main/java/org/apache/dolphinscheduler/plugin/task/api/AbstractCommandExecutor.java b/dolphinscheduler-task-plugin/dolphinscheduler-task-api/src/main/java/org/apache/dolphinscheduler/plugin/task/api/AbstractCommandExecutor.java
index 54b51c0161..c3608463f0 100644
--- a/dolphinscheduler-task-plugin/dolphinscheduler-task-api/src/main/java/org/apache/dolphinscheduler/plugin/task/api/AbstractCommandExecutor.java
+++ b/dolphinscheduler-task-plugin/dolphinscheduler-task-api/src/main/java/org/apache/dolphinscheduler/plugin/task/api/AbstractCommandExecutor.java
@@ -127,7 +127,7 @@ public abstract class AbstractCommandExecutor {
         command.add("sudo");
         command.add("-u");
         command.add(taskRequest.getTenantCode());
-        command.add(SH);
+        command.add(commandInterpreter());
         command.addAll(Collections.emptyList());
         command.add(commandFile);
 
diff --git a/dolphinscheduler-task-plugin/dolphinscheduler-task-python/src/main/java/org/apache/dolphinscheduler/plugin/task/python/PythonTask.java b/dolphinscheduler-task-plugin/dolphinscheduler-task-python/src/main/java/org/apache/dolphinscheduler/plugin/task/python/PythonTask.java
index 6d77d4555c..03462b8c49 100644
--- a/dolphinscheduler-task-plugin/dolphinscheduler-task-python/src/main/java/org/apache/dolphinscheduler/plugin/task/python/PythonTask.java
+++ b/dolphinscheduler-task-plugin/dolphinscheduler-task-python/src/main/java/org/apache/dolphinscheduler/plugin/task/python/PythonTask.java
@@ -21,9 +21,13 @@ import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
 import org.apache.dolphinscheduler.plugin.task.api.TaskException;
 import org.apache.dolphinscheduler.plugin.task.api.TaskResponse;
 import org.apache.dolphinscheduler.spi.task.AbstractParameters;
+import org.apache.dolphinscheduler.spi.task.Property;
 import org.apache.dolphinscheduler.spi.task.TaskConstants;
+import org.apache.dolphinscheduler.spi.task.paramparser.ParamUtils;
+import org.apache.dolphinscheduler.spi.task.paramparser.ParameterUtils;
 import org.apache.dolphinscheduler.spi.task.request.TaskRequest;
 import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+import java.util.Map;
 
 /**
  * python task
@@ -48,8 +52,6 @@ public class PythonTask extends AbstractTaskExecutor {
     private TaskRequest taskRequest;
 
 
-    private String command;
-
     /**
      * constructor
      *
@@ -86,17 +88,12 @@ public class PythonTask extends AbstractTaskExecutor {
         return rawPythonScript;
     }
 
-    @Override
-    public void setCommand(String command) {
-        this.command = command;
-    }
-
     @Override
     public void handle() throws Exception {
         try {
-            //    construct process
+            // construct process
+            String command = buildCommand();
             TaskResponse taskResponse = pythonCommandExecutor.run(command);
-
             setExitStatusCode(taskResponse.getExitStatusCode());
             setAppIds(taskResponse.getAppIds());
             setProcessId(taskResponse.getProcessId());
@@ -151,4 +148,25 @@ public class PythonTask extends AbstractTaskExecutor {
         return rawScript;
     }
 
+    /**
+     * build command
+     * @return raw python script
+     * @throws Exception exception
+     */
+    private String buildCommand() throws Exception {
+        String rawPythonScript = pythonParameters.getRawScript().replaceAll("\\r\\n", "\n");
+
+        // replace placeholder
+        Map<String, Property> paramsMap = ParamUtils.convert(taskRequest,pythonParameters);
+        if (paramsMap != null){
+            rawPythonScript = ParameterUtils.convertParameterPlaceholders(rawPythonScript, ParamUtils.convert(paramsMap));
+        }
+
+        logger.info("raw python script : {}", pythonParameters.getRawScript());
+        logger.info("task dir : {}", taskDir);
+
+        return rawPythonScript;
+    }
+
+
 }