The neutral grounding method of distribution network is a multi-factor technical problem, which has been a hot spot of domestic and international research. The grounding current of traditional small resistance grounding system is very small when high resistance grounding or intermittent grounding fault occurs, which can not meet the requirement of zero sequence current protection. This phenomenon will burn resistors for a long time. In view of this phenomenon, a new type of small resistance grounding system is proposed. Based on the analysis of the structure and characteristics of the neutral grounding technology for 10 kV distribution network, a new type of small resistance grounding system is simulated with Matlab. It is proved that the new type of small resistance grounding system is safer and more reliable than the traditional small resistance grounding system, hoping to supply some reference and guidance for the development of distribution network automation in China. This work is supported by Science and Technology Project of State Grid Corporation of China (No. 5212B018001V).