Rolling oil super/micro filtration membrane purifying device

The invention relates to a rolling oil super/micro filtration membrane purifying device which comprises a dirty oil storage tank, a rolling oil purifying tank and a purified oil storage tank; dirty oil in the dirty oil storage tank is delivered into the rolling oil purifying tank, and purified oil which is purified in the rolling oil purifying tank is delivered into the purified oil storage tank; the rolling oil purifying tank is further connected with a centrifugal oil residue separator which is connected with a centrifugal oil tank, and the centrifugal oil tank is connected onto the rolling oil purifying tank; a rotary cross-flow lipophilic membrane component is arranged in the rolling oil purifying tank and is connected with a suction pump; the suction pump is connected with the purified oil storage tank, and the rotary cross-flow lipophilic membrane component purifies and filters dirty oil in the rolling oil purifying tank. The rolling oil super/micro filtration membrane purifying device adopts the membrane filtering technology, achieves a 100 percent theoretical rejection rate of steel slag generated in the roll steel production process, has high filter accuracy and can ensure the quality of roll steel products.