Abstract: According to the principle that different shellac insect host trees have a kind or several kinds special requirements of habitat, in this paper the mathematics analysis method of combination of determing the nature analysis with fixed quantity analysis (Analytica Hierarchy process) is used to select optimum shellac insect host trees. Based on this analysis method, seven optimum shellac insect host trees have been selected in Cangyuan County. these tress can produce a great impact on economic benefit. By using Fuzzy Hiercarchicar Cluster analysis with site factors, the land fit for growing shellac insect host trees is divided into twelve site types rationally. The paper also studies the seleetion of good objective shellac host trees and classification of site type directly.