The study was carried out with an 11-year-old clones test plantation from mixed super seedling of Larix kaempfer in the state-owned gaoyanzi forest farm in Jianshi county.The variations of growth traits and genetic variation at different ages were analyzed.A number of superior clones with fast-growth were selected for the popularization and application in sub-alpine area of western Hubei.The results showed that the clone coefficient of variation of DBH，height and volume in 11-year-old was ranged from 8.17% to 29.53%，5.13% to 23.08%，and 17.30% to 60.42%,respectively.There were extremely significant difference with DBH，height and volume within different clones of different age.The repeatability of DBH，height and volume of clones from 6-year-old to 11-year-old was ranged from 0.60 to 0.66，0.63 to 0.85，and 0.62 to 0.75,respectively.Correlations between DBH，height in different age and volume in 11-year-old were positive and big.Correlations between DBH and volume were higher than that between height and volume.5 superior clones were selected when select indicator was DBH and consideration was given to phenotypic variation in clone.Selective ratio was 8.6%.The genetic gain of DBH，height and volume of superior clones was 8.19%,12.20% and 34.45%.