diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpAlertChannelFactory.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpAlertChannelFactory.java
index d5c628c90c..646c7b02ae 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpAlertChannelFactory.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpAlertChannelFactory.java
@@ -39,30 +39,35 @@ public final class HttpAlertChannelFactory implements AlertChannelFactory {
     public List<PluginParams> params() {
 
         InputParam url = InputParam.newBuilder(HttpAlertConstants.NAME_URL, HttpAlertConstants.URL)
+                                   .setPlaceholder("input request URL")
                                    .addValidate(Validate.newBuilder()
                                                         .setRequired(true)
                                                         .build())
                                    .build();
 
         InputParam headerParams = InputParam.newBuilder(HttpAlertConstants.NAME_HEADER_PARAMS, HttpAlertConstants.HEADER_PARAMS)
+                                            .setPlaceholder("input request headers as JSON format ")
                                             .addValidate(Validate.newBuilder()
                                                                  .setRequired(true)
                                                                  .build())
                                             .build();
 
         InputParam bodyParams = InputParam.newBuilder(HttpAlertConstants.NAME_BODY_PARAMS, HttpAlertConstants.BODY_PARAMS)
+                                          .setPlaceholder("input request body as JSON format ")
                                           .addValidate(Validate.newBuilder()
                                                                .setRequired(true)
                                                                .build())
                                           .build();
 
         InputParam contentField = InputParam.newBuilder(HttpAlertConstants.NAME_CONTENT_FIELD, HttpAlertConstants.CONTENT_FIELD)
+                                            .setPlaceholder("input alert msg field name")
                                             .addValidate(Validate.newBuilder()
                                                                  .setRequired(true)
                                                                  .build())
                                             .build();
 
         InputParam requestType = InputParam.newBuilder(HttpAlertConstants.NAME_REQUEST_TYPE, HttpAlertConstants.REQUEST_TYPE)
+                                           .setPlaceholder("input request type POST or GET")
                                            .addValidate(Validate.newBuilder()
                                                                 .setRequired(true)
                                                                 .build())
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java
index add0e7c6ac..ffdb8b91e4 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java
@@ -17,10 +17,10 @@
 
 package org.apache.dolphinscheduler.plugin.alert.http;
 
+import com.fasterxml.jackson.databind.node.ObjectNode;
 import org.apache.dolphinscheduler.alert.api.AlertResult;
 import org.apache.dolphinscheduler.spi.utils.JSONUtils;
 import org.apache.dolphinscheduler.spi.utils.StringUtils;
-
 import org.apache.http.HttpEntity;
 import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpGet;
@@ -30,14 +30,15 @@ import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClientBuilder;
 import org.apache.http.util.EntityUtils;
-
-import java.util.HashMap;
-import java.util.Map;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.fasterxml.jackson.databind.node.ObjectNode;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.HashMap;
+import java.util.Map;
 
 public final class HttpSender {
     private static final Logger logger = LoggerFactory.getLogger(HttpSender.class);
@@ -71,7 +72,13 @@ public final class HttpSender {
 
         AlertResult alertResult = new AlertResult();
 
-        createHttpRequest(msg);
+        try {
+            createHttpRequest(msg);
+        } catch (MalformedURLException e) {
+            throw new RuntimeException(e);
+        } catch (URISyntaxException e) {
+            throw new RuntimeException(e);
+        }
 
         if (httpRequest == null) {
             alertResult.setStatus("false");
@@ -95,7 +102,7 @@ public final class HttpSender {
         return alertResult;
     }
 
-    private void createHttpRequest(String msg) {
+    private void createHttpRequest(String msg) throws MalformedURLException, URISyntaxException {
         if (REQUEST_TYPE_POST.equals(requestType)) {
             httpRequest = new HttpPost(url);
             setHeader();
@@ -104,7 +111,10 @@ public final class HttpSender {
         } else if (REQUEST_TYPE_GET.equals(requestType)) {
             //GET request add param in url
             setMsgInUrl(msg);
-            httpRequest = new HttpGet(url);
+            URL unencodeUrl = new URL(url);
+            URI uri = new URI(unencodeUrl.getProtocol(), unencodeUrl.getHost(), unencodeUrl.getPath(), unencodeUrl.getQuery(), null);
+
+            httpRequest = new HttpGet(uri);
             setHeader();
         }
     }