The invention discloses an air purification device and a purification method thereof, and particularlyrelates to the technical field of air purification. The air purification devicecomprises a fixingrack, a frame is arranged at the front end of the bottom of the fixing rack, the frame is fixedly connected with the fixing rack, a support plate is arranged on the frame, tempered glass is arranged on the upper surface of the support plate, the tempered glass is fixedly connected with the support plate, an air inlet panel is mounted at the position, on the upper part of the tempered glass, of thefront surface of the fixing rack,a main air inlet is formed in the outer wall of the top of the air inlet panel, and a first air outlet is formed in the position, close to the upper part of the mainair inlet, of the top of the fixing rack. According to the air purification device and the purification method thereof,the absorption efficiency and the purification efficiency of surrounding flue gasare improved during using,the generated noise is low, surrounding people are unaffected, meanwhile disassembly of a detachable soot collector is facilitated, and thuscleaning of cigarette butts inside the detachable soot collector is facilitated.