100 cases of African swine fever(ASF) had been found continuously in 24 provinces of China since August 2018 to January 8,2019.At present,the epidemic is continuing and there is a potential risk of further spread to the whole country.In the view of the current status of the disease and its potential impact,based on the lessons of ASF prevention and control in other countries and taken the consideration of the situation in China,we constructed a complicated system of Trinity ASF epidemic risk prevention and control system centered on the government,pig cooperatives and pig farmers.This system,w...