The problem of passenger trains plan for passenger dedicated lines remains as a hot and difficult spot in research of railway transportation organization in China. The purpose of such research is to maximize the benefits for rail transport enterprises and passengers. Up to now, multiple results have been achieved on the theories and methods of passenger train plans. This paper gives a full view of the research status on passenger trains plan home and abroad, and combined with the existing research, it explored the weak aspects and prospected the future research direction.