Workpiece positioning device for machine tool machining

The utility model discloses a workpiece positioning device for machine tool machining. The utility model particularly relates to the technical field of workpiece positioning for machine tool machining. The device comprises a mounting base, a mounting side plate is fixedly mounted on the top surface of the mounting base, a fixed frame is fixedly mounted in the mounting side plate, a transmission shaft is fixedly mounted in the fixed frame, a transmission wheel is movably connected to the exterior of the transmission shaft in a sleeving mode, and a transmission assembly is fixedly connected to the end of the transmission shaft. According to the utility model, the mounting side plates are arranged; the two mounting side plates and the mounting base are fixedly connected to form a limiting mounting groove; and through the guide rail arranged in the device and the positioning movable block matched with the guide rail, the moving track of a machine tool machining element in the device is located in a fixed line, an