Slurry pump cylinder sleeve and piston structure convenient to disassemble and assemble and disassembling and assembling method

A slurry pump cylinder sleeve and piston structure convenient to disassemble and assemble is characterized by comprising a slurry pump body, a pull rod, a hoop, a piston rod, a pump head assembly, a pump head connecting bolt, a piston, a cylinder sleeve, a pump head connecting plate, a top pressing plate, a pressing stud and a pressing nut. When the cylinder sleeve and the piston of the slurry pump are replaced, the heavy pump head assembly does not need to be detached, only the cylinder sleeve, the piston rod and the piston with the weight far smaller than that of the pump head assembly need to be detached, replacement can be conducted, the operation requirement for replacing quick-wear parts such as the cylinder sleeve and the piston is greatly lowered, the operation difficulty and the labor intensity are greatly lowered, and in the disassembling and assembling process, all the parts are manually controllable, the possibility that the parts are damaged is greatly reduced, the production cost is reduced whil