The mechanical filter is suitable for industrial water or domestic water treatment equipment that requires filtered effluent turbidity generally within 5mg/L and can meet drinking water quality standards. The water contains suspended matter, condensed flake matter, sediment, iron, manganese and the binding gum particles that cannot be removed by precipitation method, etc., can be passed through the filter layer installed in the pressure filter to make the water transparent. It also has a good removal effect on suspended matter and solid matter in industrial sewage.