Classification of big data in metrology

Based on the tendency of development around data sharing in China and the relevant policies of safety management of scientific research data, the existing schemes of data classification of the metrology industry in China were studied.After investigating data classification methods of 20 national data-sharing platforms in China and relevant rules in the United States, the defects of the classification methods of metrological scientific research data in China were discussed, and the data security classification model and the data classification encoding method of metrological data were put forward.