The invention discloses a filtering device for a material of coating production. A filtering device body is arranged in an inner cavity of a tank body of a drying machine, the inner cavity of the tankbody is divided into a first cavity body and a second cavity body by the filtering device body, and the filtering device body comprises filtering cloth, a supporting plate, a pressing plate and a locking device; the filtering cloth is clamped between the supporting plate and the pressing plate, through holes are formed in the supporting plate and the pressing plate, and the supporting plate and the pressing plate are integrally fastened through the locking device. The filtering device for the material of the coating production helps to guarantee the service life of the filtering device body.