Aiming at the premature convergence problem of particle swarm optimization(PSO) algorithm while optimizing
complicated problems, the proportion control is used to improve algorithm efficiency . The particle population of PSO
algorithm can be hold at any convergence status as long as wanted, and the particle diversity and search precision are both assured, so that the efficient of algorithm is improved. The simulation results show its high performance in complicated problem,such as the radiation antenna arrays pattern synthesis with multi-null and low sidelobe restrictions.