Abstract: In order to overcome the drawback of basic PSO,such as being subject to falling into local optimization and being poor in performance of precision,an improved PSO algorithm,three swarms(cooperative) particle swarm optimization(TSC-PSO),is proposed.Regarding to several special multimodal functions and singular non-convex functions,the results of simulation show that the TSC-PSO can strengthen the global searching ability and have better optimization performance than basic PSO.