This paper delves into the Fiqhi foundations of the resistance theory in international relations. The resistance theory, proposed by countries opposing the existing international order, posits that the current international system is characterized by hegemony and that such a system is incompatible with Islamic and humanitarian principles. Consequently, proponents of this theory strive to implement and promote "resistance" against the dominant hegemonic system. On the other hand, opponents of the resistance theory endeavor to portray it as baseless and lacking foundations. This raises the question of whether the resistance theory in international relations has any Islamic legal basis. Given that proponents of this theory assert its Islamic and theoretical foundations, a fundamental question arises: What are the Fiqhi principles of the resistance theory in international relations? In response to this question, this research tests the hypothesis that the resistance theory is grounded in solid Fiqhi principles, such as the Principle of Nafy-e Sabil (Negation of Enemies’ Dominance), the Principle of Justice, the Principle of Prohibition of Cooperation (with one another) in Sin and Hostility, the Principle of La-Zarar (no harm), the Principle of Dignity, and the Theory of Jihad. The research objectives are to provide Islamic and theoretical support for the resistance theory, enhance its transparency in various dimensions, and elaborate on it within the framework of the sixth recommendation of the Second Step of the Islamic Revolution's Document. This research, employing a descriptive-analytical method, explains and analyzes the aforementioned principles and rules, and based on their evidence, arrives at the significant finding that there is a strong and fundamental connection between the resistance theory and each of these principles and rules. This constitutes the main innovation of the present research regarding the resistance theory as an example of a domestic and Islamic theory of international relations.