Improved clamp device

The utility model relates to the technical field of geosynthetic material clamps, in particular to an improved clamp device which is characterized in that a lifting device comprises two vertical plates, a threaded rod is rotatably connected between the two vertical plates, a first gear is fixedly mounted on the surface of the threaded rod, and threads on the surface of the threaded rod are reverse threads with the first gear as the center; the surface of the threaded rod is in threaded connection with two movable plates, a sliding groove is formed in the surface of the base, swing rods are hinged to the surfaces of the ends, away from the sliding groove, of the movable plates, an extension plate is fixedly mounted on the surface of one side of the upper clamping plate, a motor is fixedly mounted on the surface of the mounting plate, and a second gear is fixedly mounted at the output end of the motor. The second gear is meshed with the first gear through a motor, and the motor is electrically connected with th