The invention discloses a multi-level pressing-type air port with an adjustable blast capacity. The multi-level pressing-type air port comprises a front air guide board, a pressing assembly and a rear air guide board, wherein the front air guide board is connected with an air inlet, one end of the pressing assembly is connected with the front air guide board, and the other end of the pressing assembly is connected with the rear air guide board. The pressing assembly comprises an outer annular sleeve, an end cap, an inner rotation sleeve, a pressing rod and an elastic component, wherein the end cap is arranged at one end of the outer annular sleeve, the inner rotation sleeve is arranged in the outer annular sleeve, and the pressing rod is arranged in the inner rotation sleeve. A guide protrusion on the pressing rod can be positioned on an upper guide protruding rib of the inner wall of the inner rotation sleeve through pressing, so that the pressing rod is positioned in the axial direction in a telescopic mode, and the fully-closed state or the semi-closed state or the fully-opened state of the rear air guide board relative to the front air guide board is achieved. According to the actual requirements for fresh air by a client, the size of the air port can be conveniently adjusted through the pressing assembly, and the requirement for fresh air supplying of people is satisfied to the greatest degree.