In order to solve the problem of power quality caused a harmonic current generated by a non-linear device contained in an electric vehicle chargers, it is described that the traditional current control strategy under the APFC, it will make the network side current contain low harmonic components, resulting in a large distortion of the input current, making it difficult to further improve the power factor of the system. On this basis, the mechanism of the harmonic generation in the charging station is analyzed, it is proposed to add third harmonic compensation to reduce harmonic, and to analyze the feasibility and effectiveness of the principle. Finally, MATLAB/Simulink was used to simulate the system. The results show that this method can improve the power quality and power factor of the network side, and have good practicability.