This study was conducted in the Beigou forest farm of Mulan Forestry Authority in Hebei Province. In a field investigation,detailed measurements were made for the different densities of Larix principis. Results show that as the stand density increases,both stand diameter at chest height and crown width decrease,which have an exponential relation to the density. Single-tree volume decreases progressively,while stock volume increases progressively. The single timber volume and store are also related to the density.