The utility model relates to a lubricating oil recovering utilizes device, including spent lubricating oil heating device, except that oil tank, condenser, buffer tank, air pump, oil storage tank, plate filtration machine, PP microporous filter, rectifier unit and recovered oil storage tank, the beneficial effects of the utility model are that: structural design is reasonable, and processing simple to operate has improved the regeneration efficiency of lubricating oil greatly, and unharmful solid, the liquid of whole regenerative process, gaseous matter discharge.