Abstract: This paper introduces the essential theory of the incomplete information and dynamically game which meets with the facts,and illustrates the practicability of the strategic alliance by studying the incomplete information and dynamically centipede game.It is important to apply strategic alliance and keep developing the center business of some famous corporations.This paper also points out the necessity to establish some time.It also reduces the cost for information.Some questions about the development of the strategic alliance are pointed out in this paper.