Abstract: The basic particle swarm optimization algorithm,when simulating biology community intelligence,only has the sole transmission of information and force study mechanism,it causes the swarm rapidly to restrain and population’s diversity reduces.Therefore,this paper proposed a particle swarm optimization algorithm with synthesis study mechanism.It took the meanvalue of all particles’pbest as each particle’pbest,and varied stochastically the gbest by auto－adapted probability in the direction detection.The simulation experiment indicated that,new algorithm had a high solution precision and a quick convergence rate,and it could effectively suppress premature restrains．