Abstract: To overcome the shortcoming which Fireworks Explosion Search (FES) algorithm convergents to local best easily and improve its precision,this paper proposed an improved hybrid chaos and fireworks explosion search algorithm.At first,it excutes FES in the solution space,and washing out some individuals which has low fitness.Then,it excutes Chaos search with global best individual and the search space is minished.Finally,some new individuals are generated randomly in the space.Some experiments on the classic benchmark functions show that the new improved algorithm is robust and has higher precision.