The mandatory national standard Gb17820-2018 "Natural Gas" was issued in November 2018, which stipulates a series of arbitration methods for natural gas quality.Starting from the definition of arbitration (analysis) method, it is pointed out that the primary condition of determining arbitration method is its high accuracy.At the same time, on the basis of discussing and analyzing the technical model of chemometrics traceability chain, it is clarified that different levels of reference gas mixture (RGM) and standard metering methods are the basic elements of traceability chain.Finally, based on the above discussion, it is pointed out that there are some technical issues that require further discussion in a series of gas quality standard arbitration methods stipulated in the mandatory national standard of Gb17820-2018 "Natural Gas".For this reason, it is suggested that the relevant authorities pay full attention to it and conduct in-depth discussions to unify the understanding.