Abstract: This paper presented a modified simplex method (MSM) of project pursuit technique, and based on it, brought forword the developing regional evaluation model of Sapium sebiferum, which could integrate the multidimensional classification index into one-dimensional projection value, with high projection denoting high development potential value. Examples of developing regional Sample Set of Sapium sebiferum could be reasonably classified by the new model according to their projection value, the gradation and division of developing region of Sapium sebiferum could be used by the modified projection pursuit technique, which was simple and feasible, applicable, and maneuverable,greatly reducing the optimization time and making the value of projection function optimal. The developing regional evaluation model of Sapium sebiferum driven directly by sample data of Sapium sebiferum was built in this paper. it was more suitable that the grade of Sapium sebiferum was divided based on the cluster analysis. The central district, suitable area and marginal division of species development of Sapium sebiferum were divided.

Key words: modified simplex method, projection pursuit, Sapium sebiferum, cluster analysis