Abstract: Aiming at the stagnation exists in the cooperative particle swarm optimization,presents a new kind of the cooperative particle swarm optimization algorithm based on particle’s spatial extension.This algorithm can decide whether or not collision happens between particles by introducing the radius of particle.Once two particles collide,they can jump out of their original location according to location update formula given in advance,which can avoid trapping in stagnation.The test of the new algorithm on three typical functions shows that new algorithm not only can conquer the stagnation effectively,but can effectively improve the ability of searching better solutions and robustness.