Abstract: This paper presents a big data analysis and governance strategy of three-phase load imbalance based on iterative strategy.Using the latest cutting-edge technologies such as big data, cloud computing and broadband carrier, collect the user's hourly load, analyze the user's power consumption properties and habits, establish a calculation model in combination with mathematical thinking such as weight, variance and fitting curve, calculate the phase modulation scheme under the optimal conditions by using the iterative strategy, and then adjust the user's meter phase sequence on site, finally, the three-phase imbalance in the station area is solved in the time dimension.