At present, our country has entered the peak period of scrapped cars. This article takes scrapped automobiles as an example, based on the research background of the ``five major assemblies" in the state's latest scrapped automobile recycling management measures as non-metals, which are used as raw materials by iron and steel companies to be modified to be recycled and remanufactured. First of all, based on the differential pricing strategy, three recycling models were constructed: ``manufacturer recycling, manufacturer and retailer mixed recycling, manufacturer and retailer, and third-party mixed recycling models", and solved the three modes of recycling. Optimal pricing strategy; secondly, considering consumers' sensitivity to recycling prices and the competitive relationship between recycling parties, solving the prerequisites for the two mixed recycling and three mixed recycling, and comparing the three recycling modes, Solve the optimal interval range of each recycling mode; Third, the method of revenue sharing contract is used to coordinate the three unstable states, so as to maximize the profit of the supply chain while being in a long-term stable state; finally, the correctness of the conclusion is verified numerically. The research in this paper not only enriches the theoretical results of recycling strategies in the closed-loop supply chain, but also provides practical value for companies to choose the optimal recycling strategy according to the changes in consumers' sensitivity to recycling prices.