China has made important progress in supervising the imported veterinary drugs since Regulations on Administration of Imported Veterinary Drugs was implemented in 2007. However，a regulatory blind spot still existed in supervising imported veterinary biological products. Some law enforcement officials lacked of the knowledge of the range，types，and both sale and distribution channels of the imported veterinary biological products，which caused the confusion，ambiguity，superficiality and loopholes in supervision work. Here，the range，types of domestic markets，as well as the main bodies and relationships of both sales and distribution of imported veterinary biological products were analyzed，the law enforcement idea at grassroots level was put forward. In addition，some potential problems in the practices of supervision were also discussed，so as to provide reference for optimizing supervisory policy for imported veterinary biological products.