Abstract:The passenger flow scale of public transport system in small and medium-sized cities is relatively low. Under the general conditions, it is not suitable to construct the public transport system of rail transit and bus rapid transit with large traffic volume. In the development of regular public transport, the service level of regular public transport can be realistically improved by the improvement of public transport reliability, departure frequency and punctuality rate, which is an implementation mode suitable for the improvement of public transport development in the small and medium-sized cities. It is beneficial to increase the attraction of public transport service, to improve the share ratio of public transport, and to promote the development of green and sustainable transport systems in the small and medium-sized cities, and has the better reference significance.