Abstract: In order to select high-quality germplasm resources of Fraxinus mandshurica, with 75 half-sib families of 16-years F.mandshurica at Sanchazi Forestry Bureau, tree height, basal diameter(diameter at breast height) and volume were investigated in the 4th, 11th and 16th growth years. By ANOVA analysis, there was significant differences among different variation source(P<0.01). The variation coefficients of phenotypic and heritabilities of different traits ranged in 22.20%-63.30% and 0.796-0.981, respectively. There was significant positive correlation among different traits. Based on 10% selected rate, according to volume to evaluate the families, eight families were selected as elite families. The average volumes of elite family were higher than average values of all the families by 0.003 m³, whose genetic gain were 36.03%. The elite families can supply basis materials for the improved variety register and the rebuilt seed orchard of F.mandshurica.