Abstract: With the rapid development of economic society, power marketing services are facing the need for transformation and upgrading. This paper aims to explore how to build an intelligent portrait of power users through big data analysis technology, and realize the precision of marketing services. Based on the practical application of State Grid Jilin Power Supply Company, the strategy and implementation plan of optimizing power marketing services are put forward by analyzing massive power data, which can effectively improve the service quality and management efficiency of power marketing, and at the same time optimize the operation mode for customers to save electricity costs.