Abstract: 【Objective】In recent years, with the restriction of environmental protection policies on the development of pig industry, the delineation of "forbidden, restricted and suitable" breeding areas for live pigs in Southern Water Network Area, the cyclical fluctuation of live pig market and the influence of many epidemic risk factors such as African swine fever, etc., based on the perspective of guaranteeing the supply-side of live pig breeding, the study will provide references for supervision departments to improve the live pig supply system to ensure pig supply stability of Guangdong-Hong Kong-Macau Greater Bay Area urban agglomeration. 【Method】From the perspective of safeguarding the supply end of pig breeding, the current situation, data and information of different pig supply systems in GuangdongHong Kong-Macao Greater Bay Area urban agglomeration was classified and compared and different live pig supply systems in this area was summarized and analyzed. 【Result】At present, there are three main categories of pig supply system in Guangdong-Hong Kong-Macau Greater Bay Area urban agglomeration, and it is faced with such problems as weak supply stability and great influence of epidemic risks such as African swine fever. 【Conclusion】In view of the problems faced by the live pig supply systems in Guangdong-Hong Kong-Macao Greater Bay Area urban agglomeration, it is necessary to further improve the live pig supply systems from the perspectives of stabilizing supply, strengthening quality and safety and so on.