Recently because of the environmental pollution and oil crisis, the scientists study the new material positively, especially ring-opening polymerization (ROP) of lactides to substitute for the petrochemical plastics. Moreover, the proportion of using transition metal catalysts is high on account of the diversification of transition metal. In this article, the literatures of the lactides ROP with transition metal catalysts were reorganized by group characters, classification of ligands and experiment results to be available to readers as references.