Single-column lifting machine

The utility model relates to a lifting device, particularly a single-column lifting machine. The single-column lifting machine comprises a main cylinder body, a piston, an air inlet pipe, an object holding disk, lifting claws, stops and a bumper, wherein, the piston is placed in the in main cylinder body; a piston sleeve is installed between the main cylinder body and the piston; a lower sealing press shell and an upper sealing press shell are arranged on the piston sleeve in turn in the pressing mode; the main cylinder body, a piston sleeve and the sealing press shells are tightly screwed by bolts; the object holding disk is placed on the piston, and four lifting claws are installed on the object holding disk; the bumper is installed on a group of opposite lifting claws; the bumper is provided with safety pin holes; object stopping blocks are installed on the terminal end of the lifting claws; the air inlet pipe extends into the piston; the piston is filled with hydraulic oil. The single-column lifting machine has the advantages that the operation is easy; the appearance is beautiful; heavy objects can be conveniently lifted without space occupation when the labor is saved simultaneously; when the utility model is not used, the utility model can be completely placed on the ground and is convenient for the backing of automobiles and the placing of the objects.