Sewage filtering device and filtering method suitable for various environments and equipment

The invention provides a sewage filtering device and filtering method suitable for various environments and equipment.The sewage filtering device comprises a filtering tank, a rough filtering assembly, a water returning device and a stirring device, a control panel used for controlling the whole equipment is fixedly connected to a tank body of the filtering tank, and supporting legs capable of adjusting the height of the filtering tank are fixedly connected to the bottom of the filtering tank; a water outlet end is fixedly connected to the top of the filter tank, a pipeline extending into the filter tank is connected in the water outlet end in a penetrating manner, meanwhile, a water outlet in signal connection with the control panel is fixedly connected to the tail end of the pipeline located in the filter tank, the water outlet is arranged in an openable manner, and a rough filtration assembly for introducing sewage is connected to the bottom of the filter tank in a conducting manner; the invention provides