Abstract:Under the dual carbon goals, corporate sustainable development has become a critical issue for China's high-quality economic growth. As a primary tool for governments to guide market micro-entities, whether government subsidies can incentivize corporate R&D investment and enhance sustainable development performance warrants in-depth research. From a dual sustainability perspective (economic and environmental performance), this study empirically examines A-share listed companies in heavily polluting industries on the Shanghai and Shenzhen stock exchanges (2013-2021) using fixed-effects models. It investigates the differential mechanisms through which government subsidies affect economic versus environmental performance, the mediating role of R&D investment, and the moderating effect of executives' environmental awareness between R&D investment and sustainable performance. Key findings reveal: (1) Government subsidies positively promote economic performance but negatively impact environmental performance; (2) R&D investment mediates the subsidy-performance relationship; (3) Executives' environmental awareness exerts significant negative moderation between R&D investment and economic performance. Accordingly, governments should employ diversified regulatory tools to strengthen subsidy oversight, encourage corporate R&D innovation, and establish a multi-stakeholder environmental governance system led by governments, driven by enterprises, with active participation from social organizations and the public, thereby accelerating societal transformation and achieving corporate sustainable development.