The economic belt along the Yangtze River is the most important economic corridor of high-density, which plays a very important role in the social and economic development of our country.

As being constructed for more than ten years,the VTS of the Yangtze River make good progress.

The special surveying method adopted for the super long axis not only satisfied the surveying precision but also improved the surveying efficiency.

To solve the ultra-long line s problems related to big cities rail transportation planning and construction,based on a demanding characteristic analysis,this paper discusses the potential problems to the ultra-long line planning,discriminates the urban rail line from the suburbs line.