diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/Page.java b/webmagic-core/src/main/java/us/codecraft/webmagic/Page.java
index 93c184d..0821e6d 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/Page.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/Page.java
@@ -1,6 +1,7 @@
 package us.codecraft.webmagic;
 
 import org.apache.commons.lang3.StringUtils;
+import us.codecraft.webmagic.selector.Html;
 import us.codecraft.webmagic.selector.Selectable;
 import us.codecraft.webmagic.utils.UrlUtils;
 
@@ -28,7 +29,7 @@ public class Page {
 
     private ResultItems resultItems = new ResultItems();
 
-    private Selectable html;
+    private Html html;
 
     private Selectable url;
 
@@ -58,11 +59,11 @@ public class Page {
      *
      * @return html
      */
-    public Selectable getHtml() {
+    public Html getHtml() {
         return html;
     }
 
-    public void setHtml(Selectable html) {
+    public void setHtml(Html html) {
         this.html = html;
     }
 
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/selector/CacheElement.java b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/CacheElement.java
new file mode 100644
index 0000000..a58eba2
--- /dev/null
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/CacheElement.java
@@ -0,0 +1,36 @@
+package us.codecraft.webmagic.selector;
+
+import org.jsoup.nodes.Element;
+
+import java.util.List;
+
+/**
+ * Cache parsed element for extract.
+ *
+ * @author code4crafter@gmail.com
+ * @since 0.2.2
+ */
+public class CacheElement {
+
+    public String text;
+
+    public Element element;
+
+    public String select(Selector selector) {
+        if (selector instanceof ElementSelector) {
+            ElementSelector elementSelector = (ElementSelector) selector;
+            return elementSelector.select(getElement());
+        } else {
+            return selector.select(getText());
+        }
+    }
+
+    public List<String> selectList(Selector selector) {
+        if (selector instanceof ElementSelector) {
+            ElementSelector elementSelector = (ElementSelector) selector;
+            return elementSelector.selectList(getElement());
+        } else {
+            return selector.selectList(getText());
+        }
+    }
+}
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/selector/Html.java b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/Html.java
index 06987d8..74aa976 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/selector/Html.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/Html.java
@@ -97,4 +97,34 @@ public class Html extends PlainText {
         return selectList(cssSelector, strings);
     }
 
+    public Document getDocument() {
+        return document;
+    }
+
+    public String getText() {
+        return document.html();
+    }
+
+    /**
+     *
+     * @param selector
+     * @return
+     */
+    public String select(Selector selector) {
+        if (selector instanceof ElementSelector) {
+            ElementSelector elementSelector = (ElementSelector) selector;
+            return elementSelector.select(getDocument());
+        } else {
+            return selector.select(getText());
+        }
+    }
+
+    public List<String> selectList(Selector selector) {
+        if (selector instanceof ElementSelector) {
+            ElementSelector elementSelector = (ElementSelector) selector;
+            return elementSelector.selectList(getDocument());
+        } else {
+            return selector.selectList(getText());
+        }
+    }
 }
diff --git a/webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java b/webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java
index a16c7a1..8849052 100644
--- a/webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java
+++ b/webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java
@@ -1,6 +1,7 @@
 package us.codecraft.webmagic.model;
 
 import org.apache.commons.lang3.StringUtils;
+import org.jsoup.nodes.Element;
 import us.codecraft.webmagic.Page;
 import us.codecraft.webmagic.model.annotation.*;
 import us.codecraft.webmagic.selector.*;
@@ -34,7 +35,7 @@ class PageModelExtractor {
 
     private List<FieldExtractor> fieldExtractors;
 
-    private Extractor extractor;
+    private Extractor objectExtractor;
 
     public static PageModelExtractor create(Class clazz) {
         PageModelExtractor pageModelExtractor = new PageModelExtractor();
@@ -169,7 +170,7 @@ class PageModelExtractor {
         annotation = clazz.getAnnotation(ExtractBy.class);
         if (annotation != null) {
             ExtractBy extractBy = (ExtractBy) annotation;
-            extractor = new Extractor(new XpathSelector(extractBy.value()), Extractor.Source.Html, extractBy.notNull(), extractBy.multi());
+            objectExtractor = new Extractor(new XpathSelector(extractBy.value()), Extractor.Source.Html, extractBy.notNull(), extractBy.multi());
         }
     }
 
@@ -183,12 +184,12 @@ class PageModelExtractor {
         if (!matched) {
             return null;
         }
-        if (extractor == null) {
+        if (objectExtractor == null) {
             return processSingle(page, page.getHtml().toString());
         } else {
-            if (extractor.multi) {
+            if (objectExtractor.multi) {
                 List<Object> os = new ArrayList<Object>();
-                List<String> list = extractor.getSelector().selectList(page.getHtml().toString());
+                List<String> list = objectExtractor.getSelector().selectList(page.getHtml().toString());
                 for (String s : list) {
                     Object o = processSingle(page, s);
                     if (o != null) {
@@ -197,13 +198,19 @@ class PageModelExtractor {
                 }
                 return os;
             } else {
-                String select = extractor.getSelector().select(page.getHtml().toString());
+                String select = objectExtractor.getSelector().select(page.getHtml().toString());
                 Object o = processSingle(page, select);
                 return o;
             }
         }
     }
 
+    private List<String> select(Selector selector,Element element,String html){
+        if (selector instanceof ElementSelector){
+
+        }
+    }
+
     private Object processSingle(Page page, String html) {
         Object o = null;
         try {