diff --git a/16.InterpreterPattern/2.Code/InterpreterPattern.h b/16.InterpreterPattern/2.Code/InterpreterPattern.h
index dd008ae..744b8d7 100644
--- a/16.InterpreterPattern/2.Code/InterpreterPattern.h
+++ b/16.InterpreterPattern/2.Code/InterpreterPattern.h
@@ -1,5 +1,5 @@
-#ifndef __COMMAND_PATTERN_H__
-#define __COMMAND_PATTERN_H__
+#ifndef __INTERPRETOR_PATTERN_H__
+#define __INTERPRETOR_PATTERN_H__
 
 #include <vector>
 using namespace std;
@@ -126,4 +126,4 @@ private:
 };
 
 
-#endif //__COMMAND_PATTERN_H__
\ No newline at end of file
+#endif //__INTERPRETOR_PATTERN_H__
\ No newline at end of file
diff --git a/17.IteratorPattern/1.Picture/迭代器模式UML图.png b/17.IteratorPattern/1.Picture/迭代器模式UML图.png
new file mode 100644
index 0000000..fc134bc
Binary files /dev/null and b/17.IteratorPattern/1.Picture/迭代器模式UML图.png differ
diff --git a/17.IteratorPattern/1.Picture/迭代器模式实例UML图.png b/17.IteratorPattern/1.Picture/迭代器模式实例UML图.png
new file mode 100644
index 0000000..9fb7c5c
Binary files /dev/null and b/17.IteratorPattern/1.Picture/迭代器模式实例UML图.png differ
diff --git a/17.IteratorPattern/2.Code/Aggregate.cpp b/17.IteratorPattern/2.Code/Aggregate.cpp
new file mode 100644
index 0000000..4fc5702
--- /dev/null
+++ b/17.IteratorPattern/2.Code/Aggregate.cpp
@@ -0,0 +1,21 @@
+#include "Iterator.h"
+
+Television::Television(){}
+
+Television::Television(vector<string> iChannelList){
+	this->channelList = iChannelList;
+}
+
+Iterator* Television::createIterator(){
+	RemoteControl *it = new RemoteControl();
+	it->setTV(this);
+	return (Iterator*)it;
+}
+
+int Television::getTotalChannelNum(){
+	return channelList.size();
+}
+
+void Television::play(int i){
+	printf("���ڲ��ţ�%s����\n", channelList[i].c_str());
+}
\ No newline at end of file
diff --git a/17.IteratorPattern/2.Code/Aggregate.h b/17.IteratorPattern/2.Code/Aggregate.h
new file mode 100644
index 0000000..ac3f81f
--- /dev/null
+++ b/17.IteratorPattern/2.Code/Aggregate.h
@@ -0,0 +1,34 @@
+#ifndef __AGGREGATE_H__
+#define __AGGREGATE_H__
+
+#include <vector>
+using namespace std;
+
+// ǰ����������Ϊ�����໥������
+class Iterator;
+class RemoteControl;
+
+// ����ۺ��� Aggregate
+class Aggregate
+{
+public:
+	Aggregate(){}
+	virtual Iterator* createIterator() = 0;
+};
+
+// ����ۺ��� Television
+class Television :public Aggregate
+{
+public:
+	Television();
+	Television(vector<string> iChannelList);
+	// ʵ�ִ���������
+	Iterator* createIterator();
+	// ��ȡ�ܵ�Ƶ����Ŀ
+	int getTotalChannelNum();
+	void play(int i);
+private:
+	vector<string> channelList;
+};
+
+#endif //__AGGREGATE_H__
\ No newline at end of file
diff --git a/17.IteratorPattern/2.Code/Iterator.h b/17.IteratorPattern/2.Code/Iterator.h
new file mode 100644
index 0000000..b4e29bb
--- /dev/null
+++ b/17.IteratorPattern/2.Code/Iterator.h
@@ -0,0 +1,69 @@
+#ifndef _ITERATOR_H_
+#define _ITERATOR_H_
+
+#pragma once
+#include "Aggregate.h"
+
+#include <vector>
+using namespace std;
+
+// ���������
+class Iterator
+{
+public:
+	Iterator(){}
+	// ���������������
+	virtual void first() = 0;
+	virtual void last() = 0;
+	virtual void next() = 0;
+	virtual void previous() = 0;
+	virtual bool hasNext() = 0;
+	virtual bool hasPrevious() = 0;
+	virtual void currentChannel() = 0;
+private:
+
+};
+
+// ң���������������
+class RemoteControl :public Iterator
+{
+public:
+	RemoteControl(){}
+	void setTV(Television *iTv){
+		this->tv = iTv;
+		cursor = -1;
+		totalNum = tv->getTotalChannelNum();
+	}
+	// ʵ�ָ�����������
+	void first(){
+		cursor = 0;
+	}
+	void last(){
+		cursor = totalNum - 1;
+	}
+	void next(){
+		cursor++;
+	}
+	void previous(){
+		cursor--;
+	}
+	bool hasNext(){
+		return !(cursor == totalNum);
+	}
+	bool hasPrevious(){
+		return !(cursor == -1);
+	}
+	void currentChannel(){
+		tv->play(cursor);
+	}
+private:
+	// �α�
+	int cursor;
+	// �ܵ�Ƶ����Ŀ
+	int totalNum;
+	// ����
+	Television* tv;
+};
+
+
+#endif
\ No newline at end of file
diff --git a/17.IteratorPattern/2.Code/main.cpp b/17.IteratorPattern/2.Code/main.cpp
new file mode 100644
index 0000000..b91d5b3
--- /dev/null
+++ b/17.IteratorPattern/2.Code/main.cpp
@@ -0,0 +1,35 @@
+#include <iostream>
+#include "Iterator.h"
+
+int main()
+{
+	vector<string> channelList = { "����Ƶ��", "�ƾ�Ƶ��", "����Ƶ��", "��ӰƵ��", "����Ƶ��", "ũҵƵ��", "�Ĵ�����", "�ɶ�����" };
+	// ��������
+	Television *tv = new Television(channelList);
+	// ����ң����
+	Iterator *remoteControl = tv->createIterator();
+
+	// ˳�����
+	printf("˳�����:\n");
+	remoteControl->first();
+	// ������������Ƶ��
+	while (remoteControl->hasNext()){
+		remoteControl->currentChannel();
+		remoteControl->next();
+	}
+
+	printf("\n\n");
+
+	// �������
+	printf("�������:\n");
+	remoteControl->last();
+	// ������������Ƶ��
+	while (remoteControl->hasPrevious()){
+		remoteControl->currentChannel();
+		remoteControl->previous();
+	}
+
+	printf("\n\n");
+	system("pause");
+	return 0;
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index 12adce3..08ce255 100644
--- a/README.md
+++ b/README.md
@@ -77,4 +77,8 @@ Jungle设计模式系列
 
 19.设计模式（十九）——解释器模式
 
-博客地址：https://blog.csdn.net/sinat_21107433/article/details/102864850
\ No newline at end of file
+博客地址：https://blog.csdn.net/sinat_21107433/article/details/102864850
+
+20.设计模式（二十）——迭代器模式
+
+博客地址：https://blog.csdn.net/sinat_21107433/article/details/102879383
\ No newline at end of file