Halal financing aims to achieve economic growth while ensuring that all financial activities comply with Islamic ethics, making it inherently aligned with sustainability goals. This study explores the integration of a sustainable Halal financing framework for the Blue-Green economy, focusing on how Islamic financial principles can be leveraged to promote environmental sustainability and ethical investments. Through qualitative analysis, the study conducts a critical literature review incorporating conceptual, theoretical, and empirical perspectives. The study examines key Shariah-compliant financial instruments such as Sukuk, Mudarabah, Musharakah, and Waqf-based funding, assessing their potential to support projects in renewable energy, sustainable agriculture, and marine conservation. Additionally, the research identifies challenges such as regulatory complexities, market constraints, and the need for harmonized international standards. By analyzing the intersection of Islamic finance and the Blue-Green economy, this chapter highlights innovative financing mechanisms aligning with Islamic law and sustainability goals. The findings suggest that with the right regulatory support and collaboration between stakeholders, sustainable Halal financing can play a crucial role in fostering a more resilient and inclusive global economy, driving investments in key sectors that contribute to environmental stewardship and social responsibility.