Adopted fluffy glass fiber material with progressive structure can prevent fast blockage of the filter media surface, better filter and swallow paint, with a fluffy elastic structure, the media remain unchanged even under pressure conditions, so that all the space of the filter material is fully used to collect paint mist and sticky dust. It is mainly used in paint mist emission filtration or industrial oil mist emission filtration in coating systems, and can also be used for general ventilation pre-filtration.