Research conclusions:In this paper, the research based on the external environment about Yellow River tunnel of Lanzhou metro analyzs the design difficulty of this project，to obtain design scheme of Yellow River tunnel. The section adopts these measures such as double-line ipsilateral upstream passing round bridge pier, two lines single hole tunnels， indirect control mode slurry shield construction，prefabricated reinforced concrete segment lining, two types waterproofing measure. The ancillary facilities such as air shaft，connected aisle and waste water pump room，the fire protection and rescue facilities such as composite section evacuation platform，air shaft，connected aisle and floodgate and so on are set up，thus a whole set of completed design program of Yellow River tunnel take shape. The related conclusion and experience could enrich the building technique of under through river tunnel in domestic; it could provide reference and consult for the construction of subsequent similar engineering.