In recent years, Chongqing has developed rapidly, the population has maintained steady growth, and the demand for public transportation has also increased simultaneously. The achievements of infrastructure construction are difficult to meet today's high-quality travel needs. The public transportation system has not formed a unified organic whole. It brought a lot of inconvenience and caused some economic losses. Therefore, it is urgent to explore new concepts of public transportation development and to study new ways of rail transportation and conventional public transportation. This paper firstly re-understands the integration of public transport, then analyzes the status quo of public transport in Chongqing and the problems existing in the integration of rail transit and conventional public transport, and finally combines the integration plan of public transport in Singapore to provide new ideas for the integrated development of rail transit and conventional public transport in Chongqing.