The top-down construction method for bored super-large section tunnel based on the arch-cover method learns from the concept of top-down method used in open-cut structure constructions, which applies double-side-drift method or other section excavation method to excavate and complete the arch cover secondary lining. After the arch cover finished, the meddle and bottom of the tunnel section will use combined temporary and permanent supports, reasonable construction organization and cover and cut-bottom up method to reduce the engineering risk and difficulty. At the construction phase of the meddle and bottom of the tunnel section, the construction organization will develop in 3 dimensions. It will offer enough space for the tunnel construction. Now, this construction method has been successfully applied on Minan Avenue station in Chongqing rail transit loop line. Through this project application, it proofed this construction method can reduce the engineering risk and difficulty, enhance the construction efficiency, cut-down the project funding and shorten the construction period.