Grid filtering device for sewage treatment

The utility model provides a grid filtering device for sewage treatment, which relates to the technical field of sewage treatment and comprises a strip-shaped grid plate for filtering impurities and an anti-blocking device, the strip-shaped grid plate comprises a plurality of strip-shaped meshes; the meshes are arranged at equal intervals; the anti-blocking device comprises a reciprocating device and an anti-blocking comb; the anti-blocking comb is fixed on the reciprocating moving device; the anti-blocking comb comprises a plurality of comb teeth capable of penetrating through the strip-shaped meshes; the comb teeth are arranged at equal intervals; all the comb teeth are in one-to-one correspondence and penetrate through all the strip-shaped meshes in the strip-shaped grid plate; the reciprocating moving device can move the anti-blocking comb in the vertical direction; the reciprocating moving device can make the comb teeth move in a reciprocating mode in the extending direction of the strip-shaped meshes. T