Research conclusions:(1)Based on the existing general speed railway，high-speed railway，passenger dedicated line，according to passenger and freight transportation need，foreign railway transportation channel fluency would be realized. ( 2)Make full use of existing rapid railway，the inter-city railway would be formed with the area's economic and social development planning，which primary and secondary is clear, and maximum to link the main passenger distribution point within the region.(3)Considered the coordinated development of trunk，branch line，hub and station，the railway should maintain organic link with the city track traffic and other modes of transport:(4)The results of research may provide guidance of railway layout and regional comprehensive transportation development for coastal area，city group，but also provide reference for relevant functional departments to make decisions.