Abstract: A linear relationship exists between the diameter breast height (D. B. H.) and the crown diameter. The equations (W=A+BD) of all key plots have been worked out, then the discrepant inspection of A and B in all of the key plots inside the bureau and among the bureaus were conducted. The result is that there is a discrepancy in A but not in B.As a general rule the crown decreases as the height increases, [a linear regression between A and Hr (even superior height) was made. The equation for the crown was established. The tree numbers calculated by the equation are the largest theoretical density and the parts of the Crown overlapping was added to achieve a suitable density. Then suitable management density tables of L. gmelini, located in the midst of Ya Ke Shi area, were worked out for both plantations and natural stands.The practical inspection of these tables was made. It appears that the tables are useful for forestry management.