The neutral via arc suppression coil paralleled with a low resistance grounded system can realize arc extinguishing and reliable protection against permanent single-line-to-grounded faults, taking into account the advantages of resonant grounded systems and the neutral via a low resistance grounded system. However, in the case of high impedance faults, the paralleling low resistance may cause the zero sequence voltage to be lower than the starting threshold value of the protection device. This may cause the protection device to malfunction and even aggravate the fault. In this paper, a control method of the paralleling low resistance in the high impedance fault is proposed. First, the characteristics of zero sequence current and the zero sequence voltage before and after the paralleling low resistance is put into operation are analyzed, which is based on the power system basic principle. Secondly, from the difference between the angle of the zero sequence current and the zero sequence voltage of the fault line and the non-fault line, the criterion of the paralleling low resistance device exit is proposed. Finally, the effectiveness of the method is verified by simulation. This work is supported by the Science and Technology Project of State Grid Corporation of China (No. 52120018004L).