关键词: 主成分分析, 评价模型, 教学评价

Abstract: Instructional synthesis evaluation，currently，are always based on teacher-marked general scores or any algorithm relying on previously specified weights，both of which are subjective.This paper applies Principal Component Analysis（PCA） technique in instruction synthesis evaluation and puts forward a PCA based instruction synthesis evaluation method which can provide a subjective synthesis evaluation for students.In addition，the method is verified by being implemented as the evaluation module in the distance education platform.Finally，this paper also high lights its practical significance by demonstrating a case which the evaluation module processes.

Key words: Principle Component Analysis（PCA）, evaluation model, instruction evaluation