Abstract: This paper states the harmonic reactive current detection and multi-target current generation method based on phase locked loop error compensation.Then,it puts forward a kind of active promotion control strategy of microgrid grid-connected current electric quality based on frequency-dividing control,it combines the frequency location characteristics that is existed in proportional resonant controller,so as to achieve the zero steady state error control of specific subfrequency components,it uses the fast and accurate selective compensation harmonic and reactive current of PCS residual capacity,on this basis,PCS fuzzy PR algorithm adjusts online and sets PR ratio and integral parameters according to the fuzzy rule meter,and then effectively achieves the frequency-dividing control for PCS,it improves the response speed and control precision for electric energy quality control.At last,it sets up the microgrid gridconnected operating platform which includes the power conversion equipment,and carries out the relevant experiments,so as to verify the accuracy and validity of the proposed control strategy.