New application of virus inhibitor composition in inhibition and treatment of new crown

The invention belongs to the technical field of medicines, and particularly relates to a novel application of a virus inhibitor composition in inhibition and treatment of new crowns, including an application in preparation of a cysteine protease Mpro inhibitor and an application in preparation of a medicine for preventing or treating coronavirus infection diseases. As a 3CL protease (3-cymotrypsin-likeprotein, 3CLpro) inhibitor for resisting SAR-CoV-2 infection (COVID-19), the result of emergency voluntary use which has been completed at present shows that the safety and tolerance of a subject after the subject takes the medicine are good, and serious adverse events or adverse events causing drug withdrawal are not observed, so that the application of the 3-cymotrypsin-likeprotein inhibitor for treating the SAR-CoV-2 infection (COVID-19) has the advantages that the safety and tolerance of the subject after the subject takes the medicine are good, and the application range of the 3-cymotrypsin-likeprotein inhi