In order to balance the response speed and steady state accuracy of flywheels, a new control method combining of the constant switching variable structure control and speed-changed integration control is established on the basis of analysis of a constant switching variable structure control and a speed-changed integration control. The speed-changed integration control with high stable precision can change the accumulation of integration speed to correspond to the size of the deviation,which is able to make up the shortcomings of the constant switching variable structure control with switching characteristics.On the basis of the flywheel motor model and dynamic equation,a control model is established, then the performance of the control model is analyzed and the experiment of speed tracking is carried out. The experimental results indicate that the system dynamic and static performance have been greatly improved. When the sine instruction gives a offset in 1 000 r/min, amplitude in 100 r/min, and the period in 0.01 Hz, the tracking error is 2 r/min. Moreover,the proposed method suppresses the overshoting of the switching range, improves the steady state accuracy within switching range and prevents the bufferiy. It can satisfy the system requirements for higher precision and speed.