This paper investigates green supply chain decision making under different government policies. The problem is explored under centralized and decentralized scenarios. We verified the advantages of simultaneous government implementation of financial and uniform manufacturing policies and found that, with increased public awareness of environmental protection, government subsidy also increases: when environmental protection awareness is sufficiently strong, the government does not have to set uniform policy. Finally, by parametric and numerical analyses, our research identified the conditions under which social welfare is maximized. The results facilitate scientific policy development and provide a reference for promoting green supply chain operations.