Bus is a main component of public transportation,and then the design of bus stop position,size and form should improve efficiency of public transportation.The optimization of bus stop is studied in this paper.According to the observation and analysis of realistic traffic,a micro-cellular automaton mixed traffic flow model with bus stop is established.And then a new evaluation index for the bus stop design is introduced.Finally,an optimized bus stop scheme is obtained by simulation.This research is studied for providing a theoretical basis for the construction of bus stop.