Magnetic separation equipment, CNC grinding machine, industrial paper tape filter, magnetic roller paper tape filtration device, consists of a liquid tank, a collection tank, a filter non-woven fabric/paper tape, a magnetic roller separation device, a reducer, a transmission mechanism, a signaling mechanism, a liquid pump, and other components. The contaminated liquid containing a large amount of impurities during work is first separated by a magnetic roller separation device (optional when there are many magnetic impurities in the filtered liquid. Secondary filtration is implemented to improve the filtration effect.)