In consideration of the requirement and structure of the practical turntable, the indispensable research on the force of friction is analyzed, which impacts the speed stability performance. A kind of control strategy based on the Variable Structure Control (VSC) is introduced. According to the invariant features and the exponentially approaching rule of the VSC, the new control strategy is designed by the application of traditional double closed loop control system and VSC system. According to the simulating results and the debugging results of the control strategy on the practical turntable system, we can validate that it agrees to the simulating results, which demonstrate the effectiveness of the control strategy based on VSC in improving the speed stability performance.