High-efficiency filter is mainly used to capture particles above 0.5um dust and various suspended matters, as the end filtration of various filtration systems. It adopts ultrafine glass fiber paper as the filter material, folded plastic board paper, aluminium foil board and other materials as the dividing board, sealed by new type polyurethane sealant, and made of galvanized board, stainless steel board and aluminium alloy profile as the outer frame.