The domestic swine fever virus C strain was purified by USA, Japan, local swine fever, but the domestic swine fever epidemic is still serious. Control of classical swine fever, the industry has different views, many people think is the problem of classical swine fever vaccine, and supervision of Chinese Veterinary Medicine (hereinafter referred to as the prison) researcher Gonin P is of the view that, classical swine fever epidemic and domestic in recent years large-scale introduction of a certain relationship.