The thesis offers a comprehensive perspective on the Protection of Foreign Direct Investment (FDI) in International Business Law while highlighting the growing importance of FDI in the global economy and the need for robust legal frameworks to safeguard these investments discussing key principles and mechanisms governing FDI protection, such as patent protection, protection guidlines etc, it also goes into the challenges associated with FDI protection, including the balance between investor rights and host state sovereignty pointing out the evolving landscape of FDI agreements and the emergence of bilateral investment treaties (BITs) and multilateral agreements.