The application of low resistance grounding mode in distribution network can ensure that the system can eliminate the grounding fault quickly and reduce overvoltage effectively. The setting value, however, of zero-sequence overcurrent protection in low resistance grounding system is too high to act when high impedance grounding fault occurs. This paper puts forward a grounding protection method based on the comparison of zero-sequence current in each feeder. Zero-sequence current in each feeder is collected by centralized protection device. The feeder whose amplitude of zero-sequence current is far greater than the others or whose phase is in advance of other feeders’ for a certain value will be selected as fault feeder. The proposed method with simple principle can be used as backup protection for existing grounding fault protections and can effectively improve the sensitivity of grounding fault protection for low resistance grounding system. This work is supported by National Natural Science Foundation of China (No. 51477184) and Science and Technology Project of Guangdong Power Grid Company Limited (No. 031300KK52160023).