Drilling mud pump piston handling device

The utility model relates to a device for assembling and disassembling a piston, in particular to a device for assembling and disassembling a piston of a drilling mud pump. The device comprises a base, a gland and a clamping holder for a pull rod with a piston; the clamping holder is fixedly arranged on the base; one end of the gland is articulated with one end of the clamping holder, and the other end is fixedly arranged on the other end of the clamping holder; a mounting hole is arranged between the gland and the clamping holder; and the pull rod with the piston can penetrate through the mounting hole to be clamped in the mounting hole. The utility model has reasonable and compact structure and convenient operation, avoids the damage to the piston, a cork cap and the pull rod with the piston during the assembly and the disassembly of the piston, saves labor, reduces the labor intensity and can be widely applied to the petroleum drilling site.