Abstract: With the increasing global attention to environmental protection and sustainable development, the resource utilization of carbon dioxide （CO₂） has gradually become an important research topic in the field of chemical engineering. By catalyzing the copolymerization reaction of CO₂ and epoxides, polymers containing carbonate groups can be synthesized, providing a new approach for green and sustainable polymer preparation. Therefore, the design and optimization of catalysts have gradually become the core research direction in this field. The research progress of CO₂ synthesis of polycarbonate in recent years is reviewed, the research status of catalysts is systematically summarized, and the latest achievements in the structural characteristics, active centers, catalytic mechanisms, and product properties of Salen metal complexes are focused on. In addition, the application prospects of multicore catalyst systems in CO₂ polymerization reactions are anticipated, while challenges and opportunities in catalyst design, reaction system optimization, and catalyst recyclability within this field are proposed.