To enlarge the amplitude of limit cycle of Van der Pol type with multi degree of freedom systems, the control method was studied and the feedback controllers were designed. The vibration amplitude of the controlled system was calculated by using the numerical analysis, dand the time displacement curve and the phase trajectory of system responses were drawn based on the different control parameter. The research demonstrates that the amplitude of limit cycle can be enlarged by means of adjusting the control gain. This work has value in engineering application and has theoretical help to the bifurcation control research of high dimension nonlinear systems.