Toxic gas purification device for duplicating machine

The utility model relates to a toxic gas purification device for a duplicating machine, which comprises a square shield body and a lid body, wherein the square shield body is used for shielding the rear panel of the duplicating machine and the lid body is used for covering the back of the square shield body; a plurality of holes are formed in the rear panel; a suction hole is formed in the bottom of the square shield body and in a position close to one of the right angles; a hose filled with activated carbon is arranged between the back of the square shield body and the lid body in a snake-like manner; the inlet of the hose is connected with the suction hole; the outlet of the hose is connected with the air inlet end of an exhaust fan; the air outlet end of the exhaust fan is connected with an air outlet in one of the side walls of the lid body. According to the toxic gas purification device for the duplicating machine, a filtering device filled with activated carbon is ingeniously arranged on the rear panel