Abstract: The seedling growth indexes of 44 superior families were investigated and analyzed which were collected from 9 counties in Sichuan.The variation of height (Ht) and diameter of ground length (DGL) were tested by the nested test method.The results showed that there was a highly significant difference in Ht and DGL between provenances and families.The variation coefficient (VC) of Ht and DGL among provenances was 0.23~0.42 and 0.15~0.28,separately.The VC of Ht and DGL were 0.05~0.43 and 0.10~0.34 among families,respecitively.Three provenances (No.6,9 and 4) and five families (No.31,22,32,6 and 38) as superior ones by improved Breggin multi-index comprehensive evaluation method,taking Ht and DGL as the evaluation indicators,the tested 9 provenances and 44 families were evaluated.According to the analysis of seedling stage,parts of the superior families showed higher growth vigor than others,which had excellent potential for further selection in testing trials.