diff --git a/fizz-core/src/main/java/we/fizz/input/PathMapping.java b/fizz-core/src/main/java/we/fizz/input/PathMapping.java
index d3a2f0d..07278f4 100644
--- a/fizz-core/src/main/java/we/fizz/input/PathMapping.java
+++ b/fizz-core/src/main/java/we/fizz/input/PathMapping.java
@@ -212,6 +212,28 @@ public class PathMapping {
 		return val;
 	}
 	
+	/**
+	 * Returns value of path, return default value if no value matched by path
+	 * 
+	 * @param ctxNode
+	 * @param path    e.g: step1.request1.headers.abc or
+	 *                step1.request1.headers.abc|123 (default value seperate by "|")
+	 * @return
+	 */
+	public static Object getValueByPath(ONode ctxNode, String path) {
+		String p = path;
+		String defaultValue = null;
+		if (path.indexOf("|") != -1) {
+			p = path.substring(0, path.indexOf("|"));
+			defaultValue = path.substring(path.indexOf("|") + 1);
+		}
+		ONode val = select(ctxNode, handlePath(p));
+		if (val != null && !val.isNull()) {
+			return val.toData();
+		}
+		return defaultValue;
+	}
+	
 	public static Map<String, Object> getScriptRules(Map<String, Object> rules) {
 		if (rules.isEmpty()) {
 			return new HashMap<>();
diff --git a/fizz-core/src/main/java/we/fizz/input/extension/request/RequestInput.java b/fizz-core/src/main/java/we/fizz/input/extension/request/RequestInput.java
index 3ef884a..80b8abd 100644
--- a/fizz-core/src/main/java/we/fizz/input/extension/request/RequestInput.java
+++ b/fizz-core/src/main/java/we/fizz/input/extension/request/RequestInput.java
@@ -17,8 +17,13 @@
 
 package we.fizz.input.extension.request;
 
+import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -81,6 +86,10 @@ public class RequestInput extends RPCInput implements IInput{
 	private String reqContentType;
 	
 	private String[] xmlArrPaths;
+	
+	private static Pattern PATH_VAR_PATTERN = Pattern.compile("(\\{)([^/]*)(\\})");
+	
+	private static String DEFAULT_VALUE_SEPERATOR = "|";
 
 	public InputType getType() {
 		return type;
@@ -114,15 +123,16 @@ public class RequestInput extends RPCInput implements IInput{
 		params.putAll(MapUtil.toHashMap(config.getQueryParams()));
 		request.put("params", params);
 
+		ONode ctxNode = null;
 		// 数据转换
 		if (inputContext != null && inputContext.getStepContext() != null) {
 			StepContext<String, Object> stepContext = inputContext.getStepContext();
+			ctxNode = PathMapping.toONode(stepContext);
 			Map<String, Object> dataMapping = this.getConfig().getDataMapping();
 			if (dataMapping != null) {
 				Map<String, Object> requestMapping = (Map<String, Object>) dataMapping.get("request");
 				if (!CollectionUtils.isEmpty(requestMapping)) {
 					reqContentType = (String) requestMapping.get("contentType");
-					ONode ctxNode = PathMapping.toONode(stepContext);
 
 					// headers
 					Map<String, Object> headers = PathMapping.transform(ctxNode, stepContext,
@@ -185,18 +195,36 @@ public class RequestInput extends RPCInput implements IInput{
 			}
 			StringBuffer sb = new StringBuffer();
 			sb.append(config.getProtocol()).append("://").append(host)
-					.append(config.getPath().startsWith("/") ? "" : "/").append(config.getPath());
+					.append(config.getPath().startsWith("/") ? "" : "/").append(setPathVariable(ctxNode, config.getPath()));
 
 			UriComponents uriComponents = UriComponentsBuilder.fromUriString(sb.toString())
 					.queryParams(MapUtil.toMultiValueMap(params)).build();
 
 			request.put("url", uriComponents.toUriString());
 		} else {
-			UriComponents uriComponents = UriComponentsBuilder.fromUriString(config.getBaseUrl() + config.getPath())
+			UriComponents uriComponents = UriComponentsBuilder.fromUriString(config.getBaseUrl() + setPathVariable(ctxNode, config.getPath()))
 					.queryParams(MapUtil.toMultiValueMap(params)).build();
 			request.put("url", uriComponents.toUriString());
 		}
 	}
+	
+	private String setPathVariable(ONode ctxNode, String path) {
+		if (ctxNode == null || StringUtils.isBlank(path)) {
+			return path;
+		}
+		String[] paths = path.split("/");
+		for (int i = 0; i < paths.length; i++) {
+			Matcher matcher = PATH_VAR_PATTERN.matcher(paths[i]);
+			if (matcher.find()) {
+				String jsonPath = matcher.group(2);
+				Object val = PathMapping.getValueByPath(ctxNode, jsonPath);
+				if (val != null && !(val instanceof Map) && !(val instanceof List)) {
+					paths[i] = matcher.replaceAll(String.valueOf(val));
+				}
+			}
+		}
+		return String.join("/", paths);
+	}
 
 	@Override
 	public void doResponseMapping(InputConfig aConfig, InputContext inputContext, Object responseBody) {
diff --git a/fizz-core/src/main/java/we/fizz/input/extension/request/RequestInputConfig.java b/fizz-core/src/main/java/we/fizz/input/extension/request/RequestInputConfig.java
index 0031ad4..e524c48 100644
--- a/fizz-core/src/main/java/we/fizz/input/extension/request/RequestInputConfig.java
+++ b/fizz-core/src/main/java/we/fizz/input/extension/request/RequestInputConfig.java
@@ -19,12 +19,17 @@ package we.fizz.input.extension.request;
 
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.util.HashMap;
 import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 import org.apache.commons.lang3.StringUtils;
+import org.noear.snack.ONode;
 import org.springframework.util.MultiValueMap;
 import org.springframework.web.util.UriComponentsBuilder;
 import we.fizz.input.InputConfig;
+import we.fizz.input.PathMapping;
 
 
 
@@ -123,15 +128,15 @@ public class RequestInputConfig extends InputConfig {
 		}
 		
 	}
-
-
+	
+	public RequestInputConfig() {
+		super(null);
+	}
 
 	public String getMethod() {
 		return method;
 	}
 
-
-
 	public void setMethod(String method) {
 		this.method = method;
 	}
diff --git a/fizz-core/src/test/java/we/fizz/input/PathMappingTests.java b/fizz-core/src/test/java/we/fizz/input/PathMappingTests.java
index a7bb652..770ba26 100644
--- a/fizz-core/src/test/java/we/fizz/input/PathMappingTests.java
+++ b/fizz-core/src/test/java/we/fizz/input/PathMappingTests.java
@@ -153,6 +153,13 @@ class PathMappingTests {
 		assertEquals("Ken", (String)name2.toData());
 		assertEquals("Ken", (String)inputAbcName2.toData());
 		
+		PathMapping.setByPath(ctxNode, "step1.requests.request1.request.headers.TEST", "1", true);
+		Object abcVal1 = PathMapping.getValueByPath(ctxNode, "step1.requests.request1.request.headers.test[0]|123");
+		Object abcVal2 = PathMapping.getValueByPath(ctxNode, "step1.requests.request1.request.headers.test[3]|123456");
+		assertEquals("1", (String)abcVal1);
+		assertEquals("123456", (String)abcVal2);
+
+		
 	}