The invention discloses a machine tool for processing a star wheel for single screw compressors, and the machine tool comprises a machine tool body, a stand column, a disk type tool frame and a workpiece clamping device, wherein the stand column is arranged at the machine tool body, the disk type tool frame is arranged on the stand column, and the workpiece clamping device is arranged at the machine tool body; the disk type tool frame comprises a sliding plate, a tool rotary disk, a tool and a driver, the sliding plate is connected with the stand column and can move along the z direction, thetool rotary disk is connected with the sliding plate, the tool is arranged on the tool rotary disk, and the driver drives the tool to rotate; and the workpiece clamping device comprises a guide sleeve, a slide block, a revolving shaft and a workpiece holder, the guide sleeve is arranged on the machine tool body and can carry out horizontal movement along the x direction, the slide block is arranged on the guide sleeve and can carry out horizontal movement along the y direction, the revolving shaft is arranged on the slide block and can rotate along the circumferential direction thereof, and the workpiece holder is arranged on the revolving shaft and can carry out synchronous rotation with the revolving shaft. The machine tool disclosed by the invention has the characteristics of high processing efficiency and high machining precision, and can be used for producing high-precision multi-line (comprising single-line) envelope star wheels and multi-cylinder (comprising single-cylinder) envelope star wheels.