Abstract: With the country's legal system and environmental protection system is increasingly perfect,enterprises also began to pay attention to the recycling of waste products. Under the protection of product patent,the third party recycling system needs to obtain the original manufacturer's product patent license. In the recovery of products to reduce the cost of enterprises should identify the difference between new products and remanufactures,and then sorting and recycling. A closed-loop supply chain research model of third-party reclaiming differential pricing is established,and discusses the optimal pricing strategy of enterprises under decentralized and centralized conditions by using game theory,which is based on the research of third-party recycling and pricing in closed-loop supply chain under patent protection with the maximum profit. At the same time,it analyzes the acceptance strategy of consumers' acceptance of new products and remanufactures and the third party classification recovery,and proposes a benefit sharing-cost sharing contract coordination mechanism which extends the contract form to the third party.

Key words: closed-loop supply chain, third-party recycling, differential pricing, revenue sharing-cost sharing