Tail end non-point source pollution treatment device

According to the embodiment of the utility model, the tail end non-point source pollution treatment device comprises a water inlet, a water outlet, a coarse separation unit, a precipitation unit and a filtering unit, and the coarse separation unit is adjacent to the water inlet and comprises a filter screen; the sedimentation unit is positioned below the coarse separation unit and is divided into a plurality of sedimentation tanks through partition plates; the filtering unit is located in front of the water outlet in the water flow direction and comprises a hydraulic adjusting mechanism and a lower filtering mechanism, the hydraulic adjusting mechanism comprises a baffle capable of moving up and down in front of the water outlet, and the lower filtering mechanism is arranged below the hydraulic adjusting mechanism and comprises a plurality of filtering columns. The tail end non-point source pollution treatment device can filter fine particles when the water amount is small, and water flow can pass through the