A cylinder assembly for a rotating type air conditioner compressor comprises an upper bearing, a lower cylinder, a cylinder body, a piston and a sliding piece; the rolling piston is a hollow piston; and the end face of the sliding piece is tightly attached to the outer surface of the hollow piston. The cylinder assembly for the rotating type air conditioner compressor has the beneficial effects that due to the fact that the hollow rolling piston is adopted, the weight of the cylinder assembly for the rotating type air conditioner compressor is greatly relieved, more energy can be saved, and the whole structure is made smaller.