The invention relates to sewage treatment equipment, and in particular relates to a sewage treatment grating device. The sewage treatment grating device comprises a water inlet pipe, a water outlet pipe, a garbage collection tank and a sewage treatment tank, wherein a grating bed which is arranged in an inclined way is arranged in the sewage treatment tank, a screen is arranged on the grating bed,and sliding grooves are formed in the two sides of the grating bed; a rolling brush component is arranged on the screen, the rolling brush component is composed of a water inlet bin, a roller and a supporting plate, the water inlet bin is arranged at the upper end of the roller and is close to one side of the upper end of the grating bed, the upper end of the supporting plate is fixed on the roller, a walking wheel is arranged at the lower end of the supporting plate, and the walking wheel is arranged in the sliding grooves of the grating bed; and a rotating shaft and fan blades are arrangedin the roller, the fan blades are symmetrically arranged on the rotating shaft, and bristles are arranged at the front end of the fan blades. The sewage treatment grating device provided by the invention is simple in structure, safe, reliable, small in size, high in sewage treatment efficiency, good in separation effect, easy to use and extremely low in energy consumption.