The invention discloses a split wall-hung air conditioner with drainage structure. The split wall-hung air conditioner comprises an indoor unit; the indoor unit includes a shell; a main cross flow fan and a heat exchanger are formed in the shell; a strip-shaped air outlet is formed in the shell; an air guide port is formed in a back volute, provided with an air supply flue of the main cross flow fan, along the length direction of the air outlet; a shell opening corresponding to the air guide port is formed in the left side and/or the right side of the shell; and an induced draft fan is arranged on the left side and/or the right side of the shell, and is communicated with the air guide port through an air guide channel and the shell opening. The split wall-hung air conditioner can solve the problems of insufficient softness of exhaust and low air supply quantity in a traditional wall-hung air conditioner.