Ultrahigh-pressure shield pump

The invention relates to an ultrahigh-pressure shield pump. A connecting block is fixedly installed on the left side end face of a shield pump body in a butt joint mode, and a pump shell is fixedly installed on the left side end surface of the connecting block in a butt joint mode; a sealing shell is fixedly installed on the right side end face of the shield pump body in a butt joint mode, and a middle bearing seat is sleeved with the middle of the left side end face of the shield pump body; a rear bearing seat is sleeved with the middle of the right side end surface of the shield pump body, and a front bearing seat is sleeved with the middle of the left side end surface of the connecting block; bearings are mounted in the middle bearing seat, the rear bearing seat and the front bearing seat in a sleeved manner correspondingly, and transmission shafts are horizontally mounted in the bearings in a penetrating manner; a pressurizing impeller is fixedly mounted at the left end of each transmission shaft, an auxi