Piston disassembling tool

The utility model discloses a piston disassembling tool which comprises a fixture. A clamping type structure which is adaptive to a clamping groove in the surface of a piston is arranged at a disassembling end of the fixture. The piston disassembling tool further comprises a base and a pressing cap, wherein the base is provided with a fixing structure which is used for fixing the lower portion of the piston, the pressing cap is a hollow barrel body with one end being opened, an opened end of the pressing cap is buckled on the base to form a cavity used for containing the piston, a through hole is arranged at an unopened end of the pressing cap, and the disassembling end of the fixture penetrates through the through hole of the pressing cap and extends into the cavity. According to the piston disassembling tool, the piston is placed upwards on the base of the tool in the disassembling process, the upper portion of the piston is exposed, the fixture can be visually clamped inside the groove in the upper portion