The new crown antigen test has a 75% to 98% probability of detecting a positive person and a 95% to 99% probability of excluding a negative person. The sensitivity of the new crown antigen test kits approved for use in China is between 75% and 98%, i.e., there is a 75% to 98% probability that a positive person can be detected. The specificity of the antigen test is between 95% and 99%, which means that there is a 95% to 99% probability that a negative person can be excluded. Overall, the accuracy of the New Crown antigen test is still high, but there are false positives and false negatives, so the New Crown antigen test is not a substitute for the New Crown virus nucleic acid test. If the new crown antigen test is positive, it is not a complete diagnosis of infection with the new crown virus, and further refinement of the new crown virus nucleic acid test is needed. Moreover, the sensitivity and specificity of antigen test kits produced by different manufacturers vary, so it is recommended that the Neocoronavirus Nucleic Acid Test should prevail.