This research examines the Second Industrial Revolution's impact on the evolution of monopolistic capitalism in England and France. It investigates the technological advancements, particularly in industries like steel, electricity, and chemicals, and how they influenced economic structures. The study focuses on the emergence of monopolies and cartels and assesses their effects on market competition, labor relations, and national economies. Furthermore, the work provides a comparative analysis by drawing parallels and highlighting the key differences in how these two nations navigated this transformative period. This research seeks to understand the long-term consequences of these developments.