Impurity filtering and recycling device for feed opening

The utility model discloses an impurity filtering and recycling device for a feed opening, and relates to the technical field of impurity filtering devices, the two inner walls of a filtering box are respectively and correspondingly provided with two sliding grooves, each sliding groove is internally and correspondingly provided with two limiting rods, and the two limiting rods in the sliding grooves are respectively and slidably provided with a sliding block; an inclined filtering plate is installed among the four sliding blocks, a first discharging opening is formed in the position, close to the filtering plate, of the side face of the filtering box, and a containing groove matched with the first discharging opening is formed in the inner top face of the first discharging opening; the lower ends of the two electric push rods are jointly provided with a baffle matched with the first discharging opening, the first discharging opening is opened, impurities on the upper layer of the filtering plate slide down f