The cycloaddition reaction of CO2 and epoxy compounds is used to prepare cyclic carbonic acid. It has the characteristics of 100% atom economy and environmental friendliness, which is beneficial to alleviate the \"greenhouse effect\" . It has important theoretical and practical significance. The development of a novel and efficient catalytic system is the key to making this reaction proceed smoothly and quickly. In recent years, the metal complex catalyst system has been used the most in the cycloaddition reaction of epoxides and CO2, and the catalytic effect is the most outstanding. Here, review the research progress in the field of CO2 and epoxide cycloaddition reaction of metal complex catalyst systems such as main group metals, transition metals, lanthanide metals, 3d-4f metal catalysts in recent years. In the future, it will provide an important reference for the synthesis of new and efficient metal complex catalyst systems.