In this paper, we consider the situation of free riding behavior of retailers in the green secondary supply chain of manufacturing industry. Based on game theory and value co-creation theory, we discuss the impact of centralized decision-making and decentralized decision-making on product green degree, price and profit. We further build two value co-creation models of cost sharing and value distribution, and compare the four models and conduct numerical simulation. The results show that the overall profit is the highest under the overall decision-making, and the value co creation mode of cost sharing has no positive significance because there is no appropriate share proportion. By adjusting the value distribution proportion, the profit conflict between manufacturers and retailers can be coordinated to promote value co creation, which can provide certain guidance for manufacturing enterprises.