This paper explores the multifaceted landscape of international economic law and its profound implications for global trade and investment. Through a detailed examination of key legal instruments and treaties, including the World Trade Organization (WTO) agreements, Bilateral Investment Treaties (BITs), and Regional Trade Agreements (RTAs), the study elucidates how these frameworks shape the regulatory environment for international commerce. Central principles of non-discrimination, most-favored-nation (MFN) treatment, and national treatment are dissected to understand their practical application and impact on trade and investment flows. The role of international organizations in creating, enforcing, and shaping the norms and standards of global economic interaction is critically assessed. Furthermore, the paper delves into the legal challenges and strategic considerations businesses face in navigating international trade, investment protection, intellectual property rights, and the burgeoning digital economy. By examining case studies and practical implementations, the study highlights the dynamic interaction between legal frameworks and business strategy in the context of digital trade, data protection, and the use of digital currencies and blockchain in trade finance. This comprehensive analysis aims to provide insights into the evolving landscape of international economic law and offer strategic guidance for businesses and policymakers navigating these complexities.