To improve property of artificial bee colony algorithm in multi-robot path planning,the optimized artificial bee colony algorithm is proposed. A new environment modeling method is given,which makes barrier border smooth. The principle of artificial bee colony algorithm is analyzed,adaptive searching factor is proposed to improve new food source generation method,which balances searching range and convergence rate.The robot path point is improved by location angle,and by using this way,the location parameter is reduced.The path length,path smoothness and path safety is synthesized to a goal function by weight. The simulation trial shows that path length and time cost of improved algorithm is superior to primary algorithm. And with robot quantity increasing,the gap of the two algorithms is bigger and bigger.