In order to improve the quality of citrus fruit, the thrips species which causes citrus fruit scarring investigated in the main citrus producing areas of each county and the test base of Institute of Citrus Science Research in Gannan, Jiangxi Province, China. The results showed that there are 11 species of thrips in citrus orchards in southern Jiangxi. The major species were Thrips flavidulus （Bagnall）,Thrips palmi Karny and Scirtothrips dorsalis Hood, whose occurrence percentage was 53.25%, 18.46%,and 15.46% in 2011 respectively. Among them, T.flavidulus is the main species that can damage young fruits and results in scars on the surface of the fruits. The survey found that T. flavidulus live through the winter in soil. They peak in citrus orchards during the main flowering and young fruits period, feeding and ovipositing on citrus petal and young fruits. The characteristic sliver grey and ring-shaped scars were formed around the stem end of the fruit with the fruit′s growth.