Aiming at the DC side voltage control problem of APF of active power filter, the traditional PI control method has the contradiction of low control precision and high speed. Automatic disturbance rejection control (ADRC) greatly improves its anti-interference ability by introducing interference compensation. But at present a single setting ADRC parameter optimization algorithm can not improve the control precision. In order to solve the problem that the BAS algorithm is easy to fall into local optimum, the mutation link is introduced into the algorithm to make it jump out of local search and get the global optimal solution more rapidly. By building MATLAB/Simulink simulation and APF experimental platform to verify that the algorithm optimization can reduce overshoot,achieve accurate current tracking and reduce the harmonic rate that from 3.32% to 1.34%.