High-pathogenic blue ear disease is a popular disease of pigs in many provinces and cities in recent years, which has high rate of outbreak and causes high death rate and seriously influences the development of our country’s pig feeding industry. This disease is characteristic of high temperature and causes high death rate, influences the growth of surviving pigs, causes the female pigs to have a miscarriage and lose the ability of pregnancy, so as to influence the supply and export of our country’s porks and causes a big ecnomic loss of the pig feeding industry. Only by strengthening the recognition of the disease and taking active prevention and cure measures can the pig feeding industry be promoted.