The utility model provides a gravure plate-making electroplating pneumatic clamp. Fixture, the device comprises a portal frame, a first tailstock assembly and a second tailstock assembly, the first tailstock assembly and the second tailstock assembly are symmetrically arranged at the lower end of the portal frame and are the same in structure. The first tailstock assembly is horizontally arranged and rotationally connected with the portal frame. A driven gear is fixedly arranged on the outer ring of the first tailstock assembly; the first tailstock assembly comprises a driving cylinder and a mandrel, an output shaft of the driving cylinder is fixedly connected with one end of the mandrel, the other end of the mandrel is provided with a tip, the tip is arranged at the position close to the center of the portal frame, and the driving cylinder is connected with an external air compressor. The clamping device is stable in clamping force, high in response speed, long in service life, convenient to operate and high in production efficiency.