The invention provides a mounting method of a metal air pipe with a super-large cross section in a vertical shaft, relates to the technical field about the mounting method of the metal air pipe in thevertical shaft and solves the technical problem that a mounting method cannot be applied to mounting of the metal air pipe with the super-large cross section in the prior art. The mounting method atleast comprises following steps: prefabricated metal air pipe standard sections are transferred into the vertical shaft from the top of the vertical shaft in sequence with a forward erection method; every two adjacent metal air pipe standard sections are subjected to built-in reinforcement treatment; a fixing bracket combination for fixing the metal air pipe standard sections and the inner wall ofthe vertical shaft is fixed in advance on the inner wall of the vertical shaft and the metal air pipe standard sections, and the metal air pipe standard sections and the inner wall of the vertical shaft are fixedly connected through the fixing bracket combination. With the adoption of the mounting method, the problem about mounting of the metal air pipe with the super-large cross section in the vertical shaft is effectively solved, and stability and firmness of the mounted metal air pipe with the super-large cross section in the vertical shaft can be guaranteed. The construction is simple andconvenient.