The utilization of CO 2 as a raw material to prepare high value-added chemicals has attracted extensive attention because it is an abundant, cheap and renewable C1 source. Currently, two CO 2 copolymers have been proved of industry value. One is CO 2 based plastics (PPC), and the other is CO 2 based polyurethane (CO 2-PU), which are synthesized from copolymerization or telomerization of CO 2 and propylene oxide, respectively. The 20 years' research in Changchun Institute of Applied Chemistry witnessed the great progress in synthesis and performance improvement of CO 2 based copolymers. Though challenges still exist, their bright future is predictable.