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Objective The applicability of current China's natural gas analysis and testing standards under hydrogen-blended conditions needs to be confirmed ed to promote the standardization of hydrogen-blended natural gas. Methods By analyzing China's natural gas analysis and testing standards, 10 standards related to hydrogen-blended natural gas have been selected and the applicability of natural gas composition analysis standards and physical property calculation standards under hydrogen-blended conditions has been studied. Results The results show that the maximum hydrogen concentration specified by the natural gas composition analysis standard represented by GB/T 13610-2020 Analysis of natural gas composition-Gas chromatography and the physical property calculation standard represented by GB/T 17747.2-2011 Natural gas-Calculation of compression factor- Part 2: Calculation using molar-composition analysis is 10%, and the relevant standards need to be revised under the condition of high hydrogen concentration. Besides, if the hydrogen is not separated downstream, the interchangeability of natural gas and its standardization need to be studied urgently. Conclusions The proposed formulation and revision framework has reference significance for the future standardization work of hydrogen-blended natural gas. [ABSTRACT FROM AUTHOR]