Various forms of new energy, a large number of power electronic users are more and more connected to the distribution network, which is the irresistible development trend of distribution network. It leads to more and more reactive, active and harmonic components in the single-phase grounding fault current. The passive arc-suppression technology with arc-suppression coil still has the problem of large reactive component, active component and harmonic component in the single-phase grounding fault residual current. The active arc-suppression technology with active intervention by external injection is an effective way to solve such problems. The research status of active arc-suppression technology for single-phase grounding fault in distribution network is summarized. The structure and control algorithm of active arc-suppression device are mainly described. Firstly, the hardware structure of arc-suppression device is analyzed from the aspects of cost, advantages and disadvantages, connection mode, etc. Secondly, the advantages and disadvantages of voltage arc-suppression algorithm, current arc-suppression algorithm and comprehensive arc-suppression algorithm are compared. Finally, the hardware structure and control algorithm of active arc-suppression technology are prospected, the possible problems and possible research directions are given.