The full power hydraulic brake system has several advantages over traditional brake actuation systems. Because the hydraulic oil cannot replace the brake fluid in caliper disc brake, a dual fluid power converter, which can both retain the advantages of full-power hydraulic brake system and lower the cost of the whole machine, has been designed. By combined means of simulation and experimentations, the dynamic characteristics of completed converter were analyzed and the laws of the dual fluid power converter parameters affecting the responding characteristics of brake pressure were learnt. The result indicated that the converter could meet the requirements of brake systems on wheeled vehicles.