The invention discloses a compressor piston device. The compressor piston device comprises a cylinder body, wherein a suction valve seat and an exhaust valve seat are arranged on the cylinder body; the suction valve seat and the exhaust valve seat are symmetrically arranged; a first annular installation groove is formed in the sidewall in the cylinder body; a first annular magnet is fixedly connected into the first annular installation groove; a piston is slidably connected into the cylinder body; a second annular installation groove is formed in the sidewall of the piston; a second annular magnet sleeves into the second annular installation groove; and the like poles of the second annular magnet and the first annular magnet are opposite. The compressor piston device disclosed by the invention has the following advantages: the magnets are arranged in the piston and the wall of the cylinder, and through the principle of homopolar repulsion of the magnets, the friction between the pistonand the wall of the cylinder is reduced, so that the running condition of the device is effectively improved, and the maintenance cost of the device is lowered.