Abstract: The variation of growth ring wood quality of Cunninghamia Lanccolata was studied by analyzing the micro-hardness density small tensile ect.the variation from earlywood to latewood in a single growth ring was shown out. The result of correlation analysis,which showed a closed relations with the result of the standard experiment,proved the regularation of the data,and indicated the accuracy and reliability of using the method objectively. Which provided the vast prospects for the research of growth ring wood quality.Farther more,basis theory of ecological wood science, relation among ecology environment,the variation of wood quality were also involved.