From the practice at home and abroad, there are many problems to be solved urgently in the construction and operation of rail transit, which are mainly manifested in the following two aspects: First, from the current construction and operation of rail transit in various cities, most rail transit is in the state of government subsidies and its profitability is low. At present, only a few cities such as Hong Kong, London and Tokyo are profitable. As a kind of urban public product, rail transit has a huge external effect, which affects the value of urban rail transit space resources. As an important part of urban space, urban rail transit space is rich in natural resources, social resources and human resources. If the space resources of rail transit can be integrated and utilized, and its economic benefits can be put into the construction and operation of urban rail transit through market allocation and administrative mechanism, then a virtuous circle of investment, construction, operation and development of urban rail transit can be realized.