Abstract: On the premise of selling refurbished products to the second-hand market for profit, this paper analyzes the factors that affect the old-for-new and refurbished strategies of enterprises from the perspectives of manufacturers and third-party refurbishers. It further analyzes the influence of trade-in strategy and refurbishment subject selection on the profit and pricing strategy of the supply chain subject. The results show that cost reduction and reasonable trade-in discount coefficient are the key factors for enterprises to adopt trade-in strategy and product pricing.