Abstract: 【Objective】In order to accelerate tree growths and improve lumber quality, a new pruning optimization and evaluation method(maximizing speed of comprehensive pruning effect)was proposed.【Method】Based on the pruning field experiments, this method created a pruning effect evaluation index system by changing pruning effect speed and significance analysis. Then a mathematical model with comprehensive scores of pruning effect speed was developed using the principal component analysis(PCA). Finally the optimized pruning measures were obtained by using the comparison of comprehensive scores of the pruning measurement and validation. As a result, the pruning measurement optimization was achieved. A pruning intensity test of Taxus wallichina var. mairei was carried out in Mingxi, Fujian Province to verify the effectiveness of the method, which preliminarily realized the optimization of pruning intensity and interval combination. 【Result】The pruning intensity and interval combination significantly affected the tree growth and trunk shape traits, and it is necessary to optimize the pruning operation methods. The pruning optimum combination of Taxus wallichina var. mairei were 0.3 pruning intensity and four-year interval period by using maximizing speed of comprehensive pruning effect method. The optimum combination of pruning effect rate on the volume and breast height form was 4.11% per year and 0.48% per year, respectively. The volume of pruning optimum combination significantly increased by 15.94%, and the breast height form significantly increased by 2.04%, illustrating that the pruning optimum combination effectively accelerated tree growth and improved lumber quality.【Conclusion】The new pruning optimization and evaluation method(maximizing speed of comprehensive pruning effect)had strong operation and high accuracy, it can greatly accelerate tree growth of forests and improve lumber quality.