The trees from plantation Eucalyptus leizhou No1, E. citriodora and E. urophylla, were selected to study. The measurements of longitudinal growth strains of standing trees were conducted for three Eucalyptuses in different age, and the measurement of some parameters of green wood property also was done for them. The analysis showed: the effects of fell and height of trees on growth strains were negligible; the variance of growth strains among three species and in different age within a species was significant, but the variance trend was different. There was significant correlation between growth strains and breast height diameter of trees, but no significant correlation between growth strains and wood basic density.