The invention belongs to the technical field of patent analysis and more particularly relates to a patented technology life cycle analysis method based on component analysis. The invention provides apatented technology life cycle analysis method based on principal component analysis (PCA) which is a common statistical method. The patented technology life cycle analysis method reduces the dimension of a multi-index variable to a few comprehensive indexes to perform patent life cycle analysis and research, thereby simplifying the analysis and research of problems and achieving objectivity and rationality.