The invention relates to a high-efficiency replaceable secondary filter. The high-efficiency replaceable secondary filter comprises a tank body, a tank cover and a lifting device; the lifting device is arranged on the outer side of the tank body; the lifting device comprises an oil cylinder, an ejector rod, a base, a support rod, a slide rail and a slide block; an oil outlet is formed in the bottom end of the tank body; a baffle plate, a funnel, a filter element, a third bracket and a fourth bracket are arranged in the tank body; the filter element comprises an upper plate, a lower plate, an inner skeleton and an outer skeleton; multiple filter layers are arranged between the inner skeleton and the outer skeleton; an oil inlet is formed in the tank cover; the tank cover and the tank body are tightly connected; a stirring shaft is arranged at the middle part of the tank cover; and the stirring shaft is provided with a filter paper tray and a filter module. The high-efficiency replaceable secondary filter is excellent in oil filter effect; and filter papers can be replaced.