Deep burial method is simple, low cost and difficult to produce odor, but because of its slow harmless process, some pathogenic microorganisms can survive for a long time, and if the seepage control work is not done well, it may pollute the soil or groundwater. In addition, this law is not applicable to the treatment of infected animals, products and tissues suffering from bacillary diseases and pruritus such as anthrax and bovine spongiform encephalopathy. Once an epidemic occurs, in order to quickly control and extinguish the epidemic, prevent the spread of the epidemic, or dispose of a large number of dead animals at one time, it is best to bury them deeply.