Goldmann applanation tonometer (GAT) is internationally served as a standard on clinical diagnosis of intraocular pressure, which belongs to the domestic mandatory measuring instrument. However the GAT in China has not been mandatory tested result due to the lack of the relevant measuring capability. In present paper, a verification device of GAT measuring force has been researched and designed, using a “L” shape balance bracket and an analytical balance as a standard of judgment for balance position. The results show that such verification device is in a state of the art in China, thanks to tiny discrimination threshold and uncertainty of measurement, good repeatability and stability, where the metrological traceability is in accordance with the international standard.