Recycling of waste resources is a hot issue of social concern, but the information barriers among members of the closed loop supply chain lead to the low efficiency of recycling and remanufacturing. Based on the idea of cloud platform, the problem of information asymmetry in recycling and remanufacturing in closed-loop supply chain was solved, and a tripartite evolutionary game model among government, recyclers and remanufacturers was built. The evolutionary stability analysis was carried out by Lyapunov and Herwitz stability criterion. The strategy choice and influencing factors of whether members of closed-loop supply chain use cloud platform for information sharing were explored. Finally, Matlab was used for simulation analysis to provide decision-making basis for recycling and remanufacturing information sharing based on cloud platform. The research shows that: The government plays a leading role in the evolutionary game system, and appropriate supervision is conducive to the sharing of recycling and remanufacturing information; The opportunism of recyclers is more obvious than that of remanufacturers, and the government should pay attention to the supervision of recyclers; (3) The formation of industry alliance is conducive to the sharing of recycling and remanufacturing information.