Abstract: To investigate the antibody level and antigen of pseudorabies virus（PRV） in swinery by SNT and PCR test respectively, 1470 serum samples and 136 sick samples were collected from largescale pig farms in Fujian province. The results showed that the eligibility rate of antibodies in sows was 91.5%，89.2% and 94.8% respectively from 2005 to 2007 years；that in the piglets which was before 6 weeks old was 75.3%，56.6% and 75.5% respectively ；And that in the piglets which was over 6 weeks old was 38.0%，33.9% and 30.7% respectively. The PCR positive rate in material of sick pigs was 12.5%,17.4% and 16.0% respectively from 2005 to 2007 years. It indicated that PRV had not yet been fully purified in largescale pig farms and should been controlled furthermore.

Key words: pseudorabies virus; epidemilolgical survey; analysis