Abstract: Fifteen provenances of 8 year old Eucalyptuss tereticornis and E.camalduensis were collected from Ledong County and Qionghai City in Hainan Island.The fiber length,fiber width and basic density were measured and analyzed.The results showed that there were significant differences on fiber length and basic density between the two species.The variation range was in the following order:fiber lengthbasic densityfiber width.The environment factors had more influence on the basic density and fiber length of E.camalduensis compared with E.tereticornis. There existed significant differences in bark thickness among different provenances.The bark thickness varied with the directions.The bark thickness was the thickest in the direction toward the north.The fiber length would increase obviously from the pith to outside.By comprehensive comparison, E.tereticornis 13544,14424 and E.camalduensis 12187,14917 and 14918 were proved to be the provenances fine both in growth characters and wood properties.