Abstract: Big data technology is currently a real research hotspot in every field. Based on the big data technology, this paper discussed its application in distribution network operation and control. Firstly, based on the significance was illuminated that big data technology would bring into the development of power distribution system, this paper also has made a brief conclusion on the current application situation of big data technology in power distribution system, and analyze problems and optimization methods in the current distribution network operation and control. Then, based on big data technology, advanced operation management, maintenance arrangement, network planning and asset management in power distribution network was analyzed, and the distribution network aided decision-making platform was researched. Finally, the application of distribution network aided decision-making platform was explained in situation analysis and loads forecasting, and some suggestions were made to stimulate the development of big data and other big data-based applications in power distribution system have also been conjectured.