The waste engine oil, fuel oil and crude oil are first added to the fractionation processor for heating. Through the Catalytic reforming process, the oil vapor is distilled. The feed oil is heated to a certain temperature after passing through the tubular furnace. The oil gas generated at the connection between the coking tank and the primary distillation tower is pumped through the hot oil circulating pump and enters the fractionation tower from the primary distillation tower. After the micro negative pressure process. Oil and gas enter the first, second, and third lines respectively. Separate light oil, diesel, and heavy oil. Unrecyclable waste gas is introduced into the heating furnace for combustion.