Research conclusions: The planning system of region railway network contains five major composition modulars, including the research of planning background，analyzing of transportation demand, research of layout scheme, appraisement of program effect and scheme of plan enforcement. The research of planning background is the prerequisite of region railway network; The analyzing of transportation demand is the foundation; The research of layout scheme is the core of region railway network; The praisement of program effect is the inspection; The scheme of plan enforcement is the deepen of region railway network.