Electronic parking brake system control strategy

The invention provides an electronic parking brake system control strategy. The electronic parking brake system control strategy comprises the steps that light clamping current when a motor executes clamping operation is set in a controller of an electronic parking brake system; the light clamping current is the current of a motor when a friction plate of the parking brake actuator is just in contact with a brake disc; the light clamping current is smaller than the current when the motor clamps but larger than the current when the motor idles; when the parking brake actuator is in a clamping state and a release instruction is received, if the current clamping current of the motor is smaller than the light clamping current, motor braking is executed after the light clamping current is executed, and the release instruction is immediately responded after braking is finished. According to the invention, the working state of the parking brake actuator can be changed in time according to the request instruction of