This mathematical monograph examines the linearization of holomorphic perturbations of rotations and their applications. The work investigates the behavior of dynamical systems under small holomorphic perturbations, focusing on the mathematical properties and stability analysis of rotational systems. Published as part of the Mémoires de la Société mathématique de France series, this research contributes to the field of complex dynamical systems and perturbation theory. The author presents theoretical developments and practical applications relevant to mathematical analysis and the study of system dynamics.