diff --git a/core/actions/Animate.cpp b/core/actions/Animate.cpp
index 89f97452..9896c8a2 100644
--- a/core/actions/Animate.cpp
+++ b/core/actions/Animate.cpp
@@ -90,7 +90,7 @@ void easy2d::Animate::Update()
 			target->Load(frames[frame_index_]);
 		}
 
-		started_ += Duration(animation_->GetInterval());
+		started_ += Duration::Second * animation_->GetInterval();
 		++frame_index_;
 
 		if (frame_index_ == frames.size())
diff --git a/core/actions/Delay.cpp b/core/actions/Delay.cpp
index 1ae664b1..24ee9523 100644
--- a/core/actions/Delay.cpp
+++ b/core/actions/Delay.cpp
@@ -62,5 +62,5 @@ void easy2d::Delay::Update()
 void easy2d::Delay::ResetTime()
 {
 	Action::ResetTime();
-	started_ = Time::Now() - Duration(delta_);
+	started_ = Time::Now() - Duration::Second * delta_;
 }
diff --git a/core/actions/FiniteTimeAction.cpp b/core/actions/FiniteTimeAction.cpp
index 963fd0f3..2053db99 100644
--- a/core/actions/FiniteTimeAction.cpp
+++ b/core/actions/FiniteTimeAction.cpp
@@ -60,5 +60,5 @@ void easy2d::FiniteTimeAction::Update()
 void easy2d::FiniteTimeAction::ResetTime()
 {
 	Action::ResetTime();
-	started_ = Time::Now() - Duration(delta_ * duration_);
+	started_ = Time::Now() - Duration::Second * (delta_ * duration_);
 }
diff --git a/core/e2dutil.h b/core/e2dutil.h
index 111f3463..993967ef 100644
--- a/core/e2dutil.h
+++ b/core/e2dutil.h
@@ -513,19 +513,31 @@ namespace easy2d
 	// 时间段
 	class Duration
 	{
+	public:
+		static const Duration Millisecond;	// 毫秒
+		static const Duration Second;		// 秒
+		static const Duration Minute;		// 分钟
+		static const Duration Hour;			// 小时
+
 	public:
 		Duration();
 
 		explicit Duration(
-			float seconds
+			int64_t milliseconds
 		);
 
 		// 获取毫秒数
-		int Milliseconds() const;
+		int64_t Milliseconds() const;
 
 		// 获取秒数
 		float Seconds() const;
 
+		// 获取分钟数
+		float Minutes() const;
+
+		// 获取小时数
+		float Hours() const;
+
 		bool operator== (const Duration &) const;
 		bool operator!= (const Duration &) const;
 		bool operator> (const Duration &) const;
@@ -535,12 +547,20 @@ namespace easy2d
 
 		Duration operator + (Duration const &) const;
 		Duration operator - (Duration const &) const;
+		Duration operator * (int) const;
+		Duration operator * (float) const;
+		Duration operator / (int) const;
+		Duration operator / (float) const;
 
 		Duration& operator += (Duration const &);
 		Duration& operator -= (Duration const &);
+		Duration& operator *= (int);
+		Duration& operator *= (float);
+		Duration& operator /= (int);
+		Duration& operator /= (float);
 
 	private:
-		std::chrono::milliseconds duration_ms_;
+		int64_t milliseconds_;
 	};
 
 
@@ -553,7 +573,7 @@ namespace easy2d
 		// 获取时间戳
 		time_t GetTimeStamp() const;
 
-		// 是否是
+		// 是否是零时
 		bool IsZero() const;
 
 		Time operator + (Duration const &) const;
diff --git a/core/utils/Duration.cpp b/core/utils/Duration.cpp
index 34ea13f7..8bf90418 100644
--- a/core/utils/Duration.cpp
+++ b/core/utils/Duration.cpp
@@ -20,80 +20,148 @@
 
 #include "..\e2dutil.h"
 
-using namespace std::chrono;
+
+const easy2d::Duration easy2d::Duration::Millisecond = easy2d::Duration(1);
+const easy2d::Duration easy2d::Duration::Second = 1000 * easy2d::Duration::Millisecond;
+const easy2d::Duration easy2d::Duration::Minute = 60 * easy2d::Duration::Second;
+const easy2d::Duration easy2d::Duration::Hour = 60 * easy2d::Duration::Minute;
 
 easy2d::Duration::Duration()
-	: duration_ms_()
+	: milliseconds_(0)
 {
 }
 
-easy2d::Duration::Duration(float seconds)
-	: duration_ms_(static_cast<long long>(seconds * 1000.f))
+easy2d::Duration::Duration(int64_t milliseconds)
+	: milliseconds_(milliseconds)
 {
 }
 
-int easy2d::Duration::Milliseconds() const
+int64_t easy2d::Duration::Milliseconds() const
 {
-	return static_cast<int>(duration_ms_.count());
+	return milliseconds_;
 }
 
 float easy2d::Duration::Seconds() const
 {
-	return duration_ms_.count() / 1000.f;
+	int64_t sec = milliseconds_ / Second.milliseconds_;
+	int64_t ms = milliseconds_ % Second.milliseconds_;
+	return static_cast<float>(sec) + static_cast<float>(ms) / 1000.f;
+}
+
+float easy2d::Duration::Minutes() const
+{
+	int64_t min = milliseconds_ / Minute.milliseconds_;
+	int64_t ms = milliseconds_ % Minute.milliseconds_;
+	return static_cast<float>(min) + static_cast<float>(ms) / (60 * 1000.f);
+}
+
+float easy2d::Duration::Hours() const
+{
+	int64_t hour = milliseconds_ / Hour.milliseconds_;
+	int64_t ms = milliseconds_ % Hour.milliseconds_;
+	return static_cast<float>(hour) + static_cast<float>(ms) / (60 * 60 * 1000.f);
 }
 
 bool easy2d::Duration::operator==(const Duration & other) const
 {
-	return duration_ms_ == other.duration_ms_;
+	return milliseconds_ == other.milliseconds_;
 }
 
 bool easy2d::Duration::operator!=(const Duration & other) const
 {
-	return duration_ms_ != other.duration_ms_;
+	return milliseconds_ != other.milliseconds_;
 }
 
 bool easy2d::Duration::operator>(const Duration & other) const
 {
-	return duration_ms_ > other.duration_ms_;
+	return milliseconds_ > other.milliseconds_;
 }
 
 bool easy2d::Duration::operator>=(const Duration & other) const
 {
-	return duration_ms_ >= other.duration_ms_;
+	return milliseconds_ >= other.milliseconds_;
 }
 
 bool easy2d::Duration::operator<(const Duration & other) const
 {
-	return duration_ms_ < other.duration_ms_;
+	return milliseconds_ < other.milliseconds_;
 }
 
 bool easy2d::Duration::operator<=(const Duration & other) const
 {
-	return duration_ms_ <= other.duration_ms_;
+	return milliseconds_ <= other.milliseconds_;
 }
 
 easy2d::Duration easy2d::Duration::operator+(Duration const & other) const
 {
-	Duration d;
-	d.duration_ms_ = duration_ms_ + other.duration_ms_;
+	Duration d(milliseconds_ + other.milliseconds_);
 	return std::move(d);
 }
 
 easy2d::Duration easy2d::Duration::operator-(Duration const & other) const
 {
-	Duration d;
-	d.duration_ms_ = duration_ms_ - other.duration_ms_;
+	Duration d(milliseconds_ - other.milliseconds_);
+	return std::move(d);
+}
+
+easy2d::Duration easy2d::Duration::operator*(int value) const
+{
+	Duration d(milliseconds_ * value);
+	return std::move(d);
+}
+
+easy2d::Duration easy2d::Duration::operator/(int value) const
+{
+	Duration d(milliseconds_ / value);
+	return std::move(d);
+}
+
+easy2d::Duration easy2d::Duration::operator*(float value) const
+{
+	int64_t ms = static_cast<int64_t>(milliseconds_ * value);
+	Duration d(ms);
+	return std::move(d);
+}
+
+easy2d::Duration easy2d::Duration::operator/(float value) const
+{
+	int64_t ms = static_cast<int64_t>(milliseconds_ / value);
+	Duration d(ms);
 	return std::move(d);
 }
 
 easy2d::Duration & easy2d::Duration::operator+=(Duration const &other)
 {
-	duration_ms_ += other.duration_ms_;
+	milliseconds_ += other.milliseconds_;
 	return (*this);
 }
 
 easy2d::Duration & easy2d::Duration::operator-=(Duration const &other)
 {
-	duration_ms_ -= other.duration_ms_;
+	milliseconds_ -= other.milliseconds_;
+	return (*this);
+}
+
+easy2d::Duration & easy2d::Duration::operator*=(int value)
+{
+	milliseconds_ *= value;
+	return (*this);
+}
+
+easy2d::Duration & easy2d::Duration::operator/=(int value)
+{
+	milliseconds_ /= value;
+	return (*this);
+}
+
+easy2d::Duration & easy2d::Duration::operator*=(float value)
+{
+	milliseconds_ *= value;
+	return (*this);
+}
+
+easy2d::Duration & easy2d::Duration::operator/=(float value)
+{
+	milliseconds_ /= value;
 	return (*this);
 }
diff --git a/core/utils/Time.cpp b/core/utils/Time.cpp
index 5a8f29f1..f242c480 100644
--- a/core/utils/Time.cpp
+++ b/core/utils/Time.cpp
@@ -67,7 +67,8 @@ easy2d::Time & easy2d::Time::operator-=(Duration const &other)
 easy2d::Duration easy2d::Time::operator-(Time const & other) const
 {
 	auto ms = duration_cast<milliseconds>(time_ - other.time_).count();
-	return std::move(Duration(static_cast<float>(ms) / 1000.f));
+	Duration d(static_cast<int64_t>(ms));
+	return std::move(d);
 }
 
 easy2d::Time easy2d::Time::Now()