Abstract: The growth of parental clones was neglected in seed orchards though many Larix olgensis seed orchards had been built for several years in Northeast China. In this research,49 L. olgensis parental clones were used as materials,many growth traits were investigated and analyzed respectively. ANOVA results showed that there was significant difference among 49 clones in each growth traits. The phenotypic variation and genetic variation coefficients of different traits ranged from 7.71%-31.93% and 2.05%-12.55%,respectively. The repeatability of different traits ranged from 0.44-0.76,high repeatability and variation coefficients were beneficial for selection of elite clones. The correlation of most growth traits including tree height was extremely significant showed that each growth traits affected each other. The results of principal component analysis showed that the contribution rate of the first principal component was 61.44%,which mainly represented biomass traits. Comprehensive evaluation of L. olgensis parental clones were conducted based on the results of principal component analysis,clone L76,L5,L7,L12 and L4 were selected as elite clones,the genetic gain of different growth traits ranged from 3.55%-15.50%,the selected clones could provide materials for tree breeding of L. olgensis.