Green engine is constructed in such a way that it can produce higher efficiency by emitting zero emission of harmful gases,because of complete burning of fuel.It is light,small and of low cost.It is beneficial for the environment.It can solve the problems of over consumption of fuel.It creates a revolution in the field of engine mechanism.It has two strokes more than the four stroke engine.In future it may be used in every technical field due to higher output and low pollution factor.