Environment-friendly multi-stage sewage treatment equipment

The utility model discloses environment-friendly multistage sewage treatment equipment which comprises a wall body, a water flowing cavity, a motor, a connecting rod, a driving belt pulley, a driven belt pulley and a supporting rod, the water flowing cavity penetrating left and right is formed in the bottom of the right side of the wall body, and the motor is connected to the left portion of the rear side of the top end of the wall body through screws; the rear end of the connecting rod is locked to the output end of the motor through a coupler, the front end of the connecting rod is arranged on the front side of an inner cavity of the wall through a bearing, the two ends of the nine supporting rods are arranged at different positions of the front side and the rear side of the inner cavity of the wall through bearings respectively, and an inner cavity of the driving belt wheel is connected to the middle of the outer wall of the connecting rod in a sleeving mode. The inner cavity of the driven belt wheel is co