Rotation-preventing mechanism for compressor

The invention discloses a rotation-preventing mechanism for a compressor, which is used for a planetary disk of an oscillating compressor. The rotation-preventing mechanism comprises a bulb guide pin, a pin hole and a guide groove, wherein the bulb guide pin comprises a bulb and a pin handle; the pin hole is formed on the planetary disk; the pin handle is inserted into the pin hole; the guide groove is formed on the inner wall of a cylinder body of the compressor; the bulb is arranged in the guide groove; and the spherical surface of the bulb can slide and oscillate in the guide groove. In the rotation-preventing mechanism, the guide pin and the planetary disk can only slide relatively to the radial direction and cannot rotate along an axis; the guide pin per se can axially slide in the guide groove; the planetary disk and the guide pin can do axial oscillating motion integrally; and the autorotation of the planetary disk can be effectively prevented through the structure. In the rotation-preventing mechanism