Workpiece clamp

The utility model relates to the technical field of horizontal machining, and discloses a workpiece clamp which comprises outer shells, motors are fixedly connected to the inner walls of the two outer shells, tooth grooves are fixedly connected to the output ends of the two motors, belts are movably connected to the outer walls of the two tooth grooves, rolling columns are movably connected to the inner walls of the two belts, and the rolling columns are fixedly connected to the outer walls of the two outer shells. The two ends of the two rolling columns are connected with the inner walls of the two outer shells correspondingly, gears are fixedly connected to the outer walls of the two rolling columns correspondingly, supporting plates are fixedly connected to the outer walls of the two outer shells correspondingly, a workpiece is conveniently supported through two fixing blocks arranged on the supporting plates, and tooth grooves are formed in the bottom ends of the fixing blocks, so that the workpiece can b