Abstract: Under the intensive and large-scaled husbandry mode, the pig populations still faced great risk of many diseases with the increasing complex epidemic and virus genetic diversity. The manifestation in clinical was the popularity of new and old diseases, the co-infection and persistent infection of different pathogens which increased difficulty of prevention and control. In this paper, the immune and control technology for the main viral diseases were summarized and preferred to give a suggestion for improving population healthy level in large-scaled pig farm.

Key words: large-scaled husbandry, pig farm, viral disease, immune and control