Abstract: The analyzsis results of Eucalyptus tereticornis provenance/famlies trial involving 100 families within 14 provenances showed that there were highly significant differences among growth and other characters at family and provenance level. Correlation between growth and form quality characters were significant excepting Br. Heritability of families was stronger than individual heritability. At the age of 7, H, DBH and SV of the best provenance 13659 was 1.27, 1.32 and 2.14 times of the worst provenance 13308 respectively. Mean individual volume of the best family No.17 with 0.061 34 m3 was 3.612 5 times of the worst family No. 33 and 1.744 6 times of the average of total families by comparison. Using index selection of multiple characters, 22 superior families were selected from 100 families population tested, and the genetic gain of height, DBH, SV, CBH, SF and Br of those superior families will be reached as high as 7.31%, 6.39%, 18.01%, 13.77%, 8.22% and 5.36% respectively.