根据现代技术经济分析原理，拟定一个轮伐期，对杉木生长进行模拟，对其效益采用动态多指标描述，并运用主成分分析处理，提取主要指标，用主分量指数模型评判，从而建立了系统、合理的速生丰产林经济效益评价程序。结果表明：这种处理有明显的实际意义，其主分量指数可以不借助于定性知识就有很强的排序功能，描述性更为客观，从而为不同方案、不同时空条件下速生丰产林经济评价提供了可行性依据 According to the principle of modern technical and economic analysis, a rotation period was proposed to simulate the growth of Chinese fir. The dynamic multi-index was used to describe the benefits of the Chinese fir. Principal components analysis was used to extract the main indexes and the main components index model was used to establish the system , A reasonable rate of fast-growing forest economic evaluation program. The results show that this kind of treatment has obvious practical significance. The principal component index can have strong sorting function without descriptive qualitative knowledge, and the descriptiveness is more objective. Therefore, the economic evaluation of fast-growing and high-yield forest under different scenarios and different time-space conditions Provided a feasibility basis