Pump shaft supporting component of water pump

The utility model relates to a pump shaft supporting component of a water pump, in particular to a pump shaft supporting component of a dredging pump in a large-scale cabin. The pump shaft supporting component comprises a supporting body, wherein the supporting body supports a pump shaft through a centripetal thrust bearing and a thrust bearing, and the external circle of the thrust bearing is matched with the supporting body through a thrust disk. The pump shaft supporting component is characterized in that a bolt is mounted between the thrust disk and the supporting body; the bolt and the supporting body are connected through screw threads and are positioned; a gap is formed between the bolt and thrust disk; and a positioning pin capable of preventing the supporting body and the thrust disk from rotating relatively is distributed between the supporting body and the thrust disk. The structure of the supporting component effectively prevents the thrust disk from rotating, so that the service life of the thrus