diff --git a/TinySTL/Deque.h b/TinySTL/Deque.h
index 4bc410c..a398d14 100644
--- a/TinySTL/Deque.h
+++ b/TinySTL/Deque.h
@@ -2,10 +2,96 @@
 #define _DEQUE_H_
 
 #include "Allocator.h"
+#include "ReverseIterator.h"
 
 namespace TinySTL{
+	//class of deque iterator
+	class diter{};
+
 	//class of deque
 	template<class T, class Alloc = TinySTL::allocator<T>>
-	class deque{};
+	class deque{
+	public:
+		typedef T value_type;
+		typedef diter iterator;
+		typedef const iterator const_iterator;
+		typedef reverse_iterator<iterator> reverse_iterator;
+		typedef reverse_iterator<const_iterator> const_reverse_iterator;
+		typedef T& reference;
+		typedef const reference const_reference;
+		typedef size_t size_type;
+		typedef ptrdiff_t difference_type;
+	private:
+		typedef Alloc dataAllocator;
+
+		T *bucks;
+	public:
+		explicit deque(const allocator_type& alloc = allocator_type());
+		explicit deque(size_type n, const value_type& val = value_type(), const allocator_type& alloc = allocator_type());
+		template <class InputIterator>
+		deque(InputIterator first, InputIterator last, const allocator_type& alloc = allocator_type());
+		deque(const deque& x);
+
+		~deque();
+
+		deque& operator= (const deque& x);
+		deque& operator= (deque&& x);
+
+		iterator begin();
+		const_iterator begin() const;
+		iterator end();
+		const_iterator end() const;
+		reverse_iterator rbegin();
+		const_reverse_iterator rbegin() const;
+		reverse_iterator rend();
+		const_reverse_iterator rend() const;
+		const_iterator cbegin() const;
+		const_iterator cend() const;
+		const_reverse_iterator crbegin() const;
+		const_reverse_iterator crend() const;
+
+		size_type size() const;
+		size_type max_size() const;
+		void resize(size_type n, value_type val = value_type());
+		bool empty() const;
+		void shrink_to_fit();
+
+		reference operator[] (size_type n);
+		const_reference operator[] (size_type n) const;
+		reference front();
+		const_reference front() const;
+		reference back();
+		const_reference back() const;
+
+		void push_back(const value_type& val);
+		void push_back(value_type&& val);
+		void push_front(const value_type& val);
+		void push_front(value_type&& val);
+		void pop_back();
+		void pop_front();
+		iterator insert(iterator position, const value_type& val);
+		void insert(iterator position, size_type n, const value_type& val);
+		template <class InputIterator>
+		void insert(iterator position, InputIterator first, InputIterator last);
+		iterator erase(iterator position);
+		iterator erase(iterator first, iterator last);
+		void swap(deque& x);
+		void clear();
+	public:
+		template <class T, class Alloc>
+		friend bool operator== (const deque<T, Alloc>& lhs, const deque<T, Alloc>& rhs);
+		template <class T, class Alloc>
+		friend bool operator!= (const deque<T, Alloc>& lhs, const deque<T, Alloc>& rhs);
+		template <class T, class Alloc>
+		friend bool operator<  (const deque<T, Alloc>& lhs, const deque<T, Alloc>& rhs);
+		template <class T, class Alloc>
+		friend bool operator<= (const deque<T, Alloc>& lhs, const deque<T, Alloc>& rhs);
+		template <class T, class Alloc>
+		friend bool operator>  (const deque<T, Alloc>& lhs, const deque<T, Alloc>& rhs);
+		template <class T, class Alloc>
+		friend bool operator>= (const deque<T, Alloc>& lhs, const deque<T, Alloc>& rhs);
+		template <class T, class Alloc>
+		friend void swap(deque<T, Alloc>& x, deque<T, Alloc>& y);
+	};//end of deque
 }
 #endif
\ No newline at end of file