Abstract: Pinus yunnanensis, which is a main commercial species in the Yunnan-Guizhou plateau, holds an important position in forestry production. Based upon the study on the differences of the ecological condition in the distribution range of Pinus yunnanensis, this paper suggests 6 divided seed areas so that it provides a scientifie base for the future use and allocation of the seeds by means of summing up the experience of past production and referring to the experimental results of the seed source.