To provide a control method of a voice coil motor and a lens focus system.

In the control method of the voice coil motor, a total variation amount of a coil current of the voice coil motor is divided to be multi-variable. A time which varies at every degree is made to be a half of a spring resonance period of the voice coil motor. Thus, a resonance degree of the spring is considerably reduced. Consequently, the voice coil motor is speedily stabilized, and a focus time is shortened.