Pump shaft of plastic pump

The utility model relates to the technical field of plastic pumps, in particular to a pump shaft of a plastic pump, which comprises a pump shaft body, two ends of the pump shaft body are provided with a dismounting mechanism and a blocking mechanism arranged in the dismounting mechanism. At the moment, the threaded groove and the threaded block can be separated, the circular ring can be taken out from the interior of the circular groove, that is, the threaded sleeve head and the second circular block are separated from each other, and at the moment, the threaded sleeve head and the second circular block can be cleaned, and a second pump opening and a first pump opening in the threaded sleeve head and the second circular block can be cleaned; when the telescopic rod extends, the telescopic rod pushes the blocking disc to move along the groove until the blocking disc is separated from the third pump opening, the blocking disc is arranged outside, the filter screen can be deeply cleaned at the moment, and theref