Abstract: ObjectiveTo analyze the results of etiological surveillance of influenza in Jiangxi from 2004 to 2007, find out the circulating trend of influenza virus and explore the epidemic pattern of influenza. MethodsThe nasopharyngeal swabs were taken from the influenza patients in sentinel hospitals at national level, influenza virus was isolated by using MDCK cell and identified by hemagglutination inhibition (HI) test. ResultsFrom 2004 to 2007, 4564 samples were taken, and 576 strains of influenza virus were isolated (12.62%). Of these strains, 118 were H1N1(20.49%), 238 were H3N2 (41.32%), 108 were B/Victoria lineage(18.75%), 114 were B/Yamagata lineage(19.79%). ConclusionFrom 2004 to 2007, influenza virus H1N1, H3N2, B/Yamagata lineage and B/Victoria lineage circulated in Jiangxi province, and H3N2 virus was predominated.