Abstract: To elect excellent clones of Eucalyptus urophylla suitable for different water and nutrient conditions,34 clones were selected as materials,and the variance analysis and genetic parameters were evaluated for growth and biomass in 18 months under different water and nutrient treatments by using a randomized complete block design. The results showed that the growth（height and diameter）and biomass（trunk,branch,root）of E.urophylla reached significant or extremely significant levels in different block,water,nutrient,water × nutrient interaction and clones,indicated that water,nutrient and clones affected the growth and biomass of each organ of E. urophylla. Under the combined treatment of water and nutrients,the growth and biomass of each organ were better under the combination of 33 and 32 treatments. The total fresh biomass in combination 32 was the largest,which increased by 135.70% compared with combination 11. There were significant positive correlations among fresh and dry in trunk,roots and leaves,and these values were above 0.90 respectively. The component variance for height,ground diameter and biomass ranged from 4.28-31 255.80,and the individual repeatability of most traits was above 0.15 that reached significant levels. ZQUB39 and ZQUC23 grew well in soil with low water and nutrient,while UD42,LDUC1 and ZQUA3 grew well in soil with high water and nutrient with 15% selection rate using BLUP predicted genotypes of E. urophylla clones. These excellent clones would be promted in the future.