Abstract:The convergence of financial management and supply chain operations remains under-theorized regarding its role in the global transition to ESG compliance. This paper addresses the "Liquidity-Sustainability Paradox"—where stringent ESG requirements often marginalize capital-constrained suppliers—by proposing a novel Sustainable Supply Chain Finance Index (SSCF Index). Using a systems-based framework, we analyze the integration of green financial instruments and digital enablers. Our findings suggest that technological transparency is a prerequisite for mitigating "greenwashing" risks in supply chain finance. This study contributes a standardized evaluative tool for practitioners and a theoretical foundation for future empirical research in sustainable finance.