Municipal engineering environment-friendly domestic wastewater multi-stage treatment device

The municipal engineering environment-friendly domestic wastewater multi-stage treatment device comprises a multi-stage treatment box, the outer wall of one side of the multi-stage treatment box is fixedly connected with a filter box, the outer wall of one side of the filter box is fixedly connected with a machine box, an opening is formed in the outer wall of the top of the filter box, and the outer wall of the top of the machine box is fixedly connected with the machine box. A mounting frame is fixedly connected to the outer wall of the top of the filtering box, a discharging opening is formed in the outer wall of one side of the filtering box, a discharging box is fixedly connected to the inner wall of the discharging opening, a mounting frame is connected to the inner walls of the two sides of the filtering box through bearings, a filter screen is fixedly connected to the inner wall of the mounting frame, and a bottom plate is fixedly connected to the outer wall of the bottom of the mounting frame. The ad