The New Crown Concinol vaccine and the Coxin vaccine can be mixed. The new crown vaccine of Consenol Biologicals is a recombinant new coronavirus vaccine, which belongs to adenovirus vaccine, i.e., the gene of the new coronavirus is specially treated to reduce its virulence, and this treated gene fragment is put in adenovirus, which is used as a carrier to prevent the infection of the new coronavirus. And Beijing KXV vaccine is an inactivated vaccine, i.e., the virus is cultured and then killed by physical or chemical methods to kill the infectious virus, so that the virus loses its pathogenicity but retains its antigenicity. Therefore, the two vaccines, Xin Guan Kang Xinuo and Ke Xing, are made on different principles and have their own merits, and the current policy supports mixing the vaccines for sequential vaccination in order to obtain stronger immunity.