Abstract: 12 years old of offspring forest of 50 ellite trees of free-pullination half-sib families of the timber density of the measurement results showed that there are significant variances among offsprings of ellite trees,and the variances between families are bigger than the variances inside families. There is a mean negative genetic relationship between the characteristic of lumber density and tree height, and there is no negative genetic relationship between the timber density and brest diameter,volume.The size of characteristic variances is tree height >brest diameter>lumber density.Among the experiment group of the growth and wood feature’97 offspring of families were better than the check.