Quick portable jackscrew

The utility model relates to a device for a motor jackscrew of an oil pumping unit, in particular to a quick portable jackscrew. The quick portable jackscrew is characterized by comprising a jackscrew seat arranged on a sliding rail, wherein a positive screw rod is fixedly arranged on the jackscrew seat; a ratchet spanner and a through hole are arranged at one end of the positive screw rod; the other end of the positive screw rod in threaded connection with a negative screw rod; a negative screw rod nut is arranged at the end part of the negative screw rod; a brake plate is arranged on the negative screw rod nut; and a reverse baffle is arranged at one side of the jackscrew seat. Therefore, the quick portable jackscrew has the beneficial effects of simple structure, small size, light weight and convenience in carrying. The quick portable jackscrew is vertically and rotatably arranged so as not to be influenced by a groove; the general effect is achieved; and by adopting the ratchet spanner as a rocker arm, th