Ball type CV joint is an automotive part transferring power of an automotive engine to a wheel. Among internal parts of CV joint a cage is easy to break by powerful torque of an automotive engine. In this paper the research for reducing contact forces on a cage is performed by the optimization analysis using the ADAMS multi-body dynamic model. In order to find influential main factors among design factors consisting of CV joint, effect analysis is performed using DOE with Minitab. And the optimization analysis is performed by selected main factors, design space and constraints using ARSM(Adaptive Response Surface Method) in HyperStudy.