In order to improve the current tracking performance of active power filter and aiming at the shortage of traditional single hysteresis SVPWM current tracking algorithm, an optimization method of current tracking control strategy for double hysteresis SVPWM is proposed for shunt active power filter. In this method, the three-phase alternating positive and negative error current vector to determine the region where the voltage space vector, compared to traditional methods, to avoid the tedious operation region where the space voltage vector is determined, while the phase voltage detection part omitted grid, Simplifying the circuit design;The method has high operation efficiency, high robustness and Superiority. It can be confirmed experimentally.