Recently, the Green Ye factory grille cleaning machine was used for domestic sewage treatment in a certain district of Dongguan. It was installed and debugged on-site by the Green Ye Environmental Protection Engineering Department, and the on-site debugging was very satisfactory. The lower part of the grille cleaning machine is installed in the water inlet channel. When the transmission system drives the sprocket to rotate uniformly and directionally, the entire rake chain of the mechanical grid cleaning machine moves from top to bottom, carrying solid debris to separate from the liquid. The fluid flows out through the gap between the mechanical grid rake teeth, and the entire working state continues. Due to the special structural shape of the rake teeth of the mechanical grid machine, when the rake tooth chain carries debris to the upper end and moves in reverse, relative self-cleaning motion occurs between the front and rear rakes, causing the debris to fall off by gravity. At the same time, a pair of rubber plate brushes can be installed behind the equipment to ensure that each row of rake teeth can be brushed clean when moving to this position.