Abstract: With the development of economy, people’s awareness of environmental protection is increasing, which provides power for the green research and development of supply chain firms. In the supply chain green R&D, firms are affected by two aspects. On the one hand, firms within the supply chain improve the overall coordination of the green supply chain by signing cost-sharing contracts and revenue-sharing contracts; on the other hand, the government subsidizes firms’ green R&D. How does the government’s green subsidy (external influence) affect the contractual behavior of enterprises within the supply chain (internal behavior)? The green R&D subsidy policy is introduced into the supply chain theory model and analyzes the above question. It is shown that cost-sharing contract and revenue-sharing contract have certain substitution effect on government R&D subsidy policy. Under the green R&D subsidy policy, will the cost-sharing contract and the revenue-sharing contract in the supply chain improve the coordination of the supply chain? It is found that the existence of cost-sharing contract will not improve the overall profit level of the industrial chain, while the revenue-sharing contract can achieve the purpose of improving the overall profit level of the supply chain. From the perspective of social welfare, revenue sharing contract can achieve the purpose of improving the level of social welfare. Furthermore, when the contractual decision is negotiated by the enterprises in the supply chain, the above results still hold.

Key words: R&D subsidy; cost-sharing contract; revenue-sharing contract; bargaining