Abstract:Hydrogen is an efficient and clean energy, which has been incorporated into the national energy strategy. With the rapid development of hydrogen energy and fuel cell vehicle industry in China, compressed hydrogen dispensers (referred to as hydrogenerators) have been increasingly widely used. This article takes the current status of application of hydrogen energy in China as an entry point, analyzes in detail the technical status of China's hydrogenation machines, measurement traceability issues, measurement regulation progress, comparison of traceability methods, development and application of measurement traceability standard devices, and measurement traceability prospects. The challenges and suggestions for the development of mechanical metering traceability are of guiding significance for ensuring the establishment and improvement of the measurement and traceability system of hydrogenation machines in China.