In order to determine the epidemic situation and immune protection effect of swine viral diseases，the nucleic acid detection was carried out towards 1 304 pig tissue samples（including lung，lymph node and spleen）from slaughterhouses of 7 counties（cities，districts）to detect HPRRSV and CSFV by the methods of RT-PCR and PCR，and 70 tissue samples（lung，lymph node，spleen）collected from scaled swine farms were also detected for HPRRSV，CSFV，PRV and PCV . A total of 8 572 serum samples from 7 counties (cities，districts) of Wuzhou City were detected for antiibodies against CSFV by ELISA，and 2 066 serum samples were tested for antibodies against PRRSV. The results showed that the nucleic acids of both HPRRSV and CSFV were undetectable. The positive detection rates of PRV and PCV were 14.3% and 57.1%，respectively. The qualified rates of immune antibody of CSFV and PRRSV were 90.41% and 73.48%，respectively. Monitoring results showed that the major prevalent viral swine diseases in Wuzhou City were two kinds swine viral diseases of Pseudorabies and Porcine circovirus disease，and the occurrence and epidemic of viral swine diseases were controlled effectively by compulsory immunization of CSF and PRRS.