This research article presents the modeling and simulation of a hydraulic-mechanic regeneration system, which has as aim turn kinetic energy of a truck class VI into hydraulic power. The energy is stored and when it is needed, it is released to the system in terms of torque to the power transmission line of the truck. It analyzed the performance of the dynamic regeneration energy hydraulic- mechanic system and it was done under simulation environment using the computing platform Matlab-Simulink© which allowed to understand thoroughly its dynamic behavior, response before certain signs and to obtain more information about the best way of management both the capture and delivery of the above mentioned energy.