在现有的道路条件下，提高交通控制和管理水平，合理利用现有的交通设施，充分发挥其能力，是解决我国现在交通问题的有效方法之一。而对单路口信号配时的优化，是城市交通区域控制的基础，十分之重要。本文将自适应变异粒子群算法应用于交通信号配时，与传统的信号配时方法相比较，车辆的平均延误得到了明显的改善。-the existing road conditions, traffic control and management, rational use of existing transport facilities, give full play to their ability is to solve the traffic problem in China is now one of the effective ways. And the single-junction signal timing optimization of the city is controlled by the regional transport infrastructure is very important. In this paper, adaptive mutation PSO applied to the traffic signal timing with the traditional signal timing methods, the average vehicle delay has been markedly improved.