The invention discloses a single phase grounding fault positioning method based on power distribution network data processing, comprising: S01) obtaining the mass real-time data of the power distribution network through a power distribution terminal, a fault indication device and an intelligent power meter; S02) creating a Storm-cluster-based power distribution network's real time flow data analyzing platform; S03) designing a flow data processing topological structure integrating a plurality of single phase grounding fault positioning technologies; and S04) according to the determining of the different single phase grounding fault positioning technologies, outputting and storing the result. The single phase grounding fault positioning method proposed by the invention solves the power network distribution's single phase grounding fault positioning problem, and is suitable for grounding fault positioning of different grounding systems and different groundings.