通过实验确定了机器人化柔性自动装配线中,底板零件到达时间间隔的概率密度函数服从f(t)=aexp(-bt)所决定的分布规律.运用随机服务系统理论对该装配线进行了仿真研究,分析了底板到达时间间隔的均值、各装配工位自动装配机服务时间的分布参数和缓冲区大小对装配线性能的影响,提出了若干改进建议,使装配线运行状态更良好. The distribution law of the probability density function of the arrival time interval of bottom plate in f (t) = aexp (-bt) is determined experimentally in the robotized flexible automatic assembly line.The simulation of the assembly line is carried out by using stochastic service system theory, The paper also analyzes the average value of floor arrival time, the distribution parameter of service time and the size of buffer zone on the performance of assembly line, and puts forward some suggestions to improve the running status of assembly line.