The invention discloses a sewage treatment grating well with an activated carbon adsorption function. The sewage treatment grating well with the activated carbon adsorption function comprises a cylinder body; the upper end in the cylinder body is a treatment chamber; the lower end in the cylinder body is a filtering chamber; one side of the filtering chamber is provided with a water inlet; the other side of the filtering chamber is provided with a drainage hole; two trash racks are symmetrically arranged on the two sides in the filtering chamber respectively; a clamping groove is arranged in the center of the bottom end of the filtering chamber; one side of the treatment chamber is provided with an opening and is hinged with an end cover; the outer end of the end cover is provided with anair purifier; the top end of the treatment chamber is provided with a lifting frame; a fixed frame is connected to the lower end of the lifting frame; the lower end of the fixed frame is provided withan activated carbon filtering plate; a connection part of the activated carbon filtering plate and the fixed frame is provided with a hook frame; and the activated carbon filtering plate and the trash racks are arranged in parallel. Through the mode, the sewage treatment grating well can perform adsorption and filtering on suspended matters and adsorbable particles in the grating well through theactivated carbon filtering plate.