Abstract: This article approaches the process of cultivation of artificial timber stand and introduces a new concept Cultivability from the principle of economics and silviculture. It points out that the output value of silviculture of artificial timber stand should be divided into two parts, the output value of stumpage and the output value of cultivability. A statistical method of calculating output value of silviclture is develop ed, with regard to forest compartment asa basic unit and deals with the classifications of forest sites. The use of this method is able to make the calculation of output value of silviculture more rational and accurate and eliminate influences caused by some natural factors so as to improve the comparability of output value indexes.