Abstract: The causes of low-voltage problems in rural power grids are complex, involving many aspects such as medium-voltage lines, distribution transformer operating conditions, and low-voltage internal wiring. In order to effectively improve the accurate analysis of the low voltage problem in the rural power grid and formulate effective solutions, this paper clarifies the collection platform of the relevant data involved in the analysis system by designing a system for analyzing the causes of low voltage problems and formulating measures. Problem judgment basis and related algorithms. According to the structure of power grid equipment, the process and execution steps of self-service analysis and judgment are formulated at the level of medium voltage line, distribution and transformer operation level, and the level of internal wiring in the station area, which provides a theoretical and technical basis for the realization of the system design algorithm. According to the causes of low voltage problems caused by various factors, the article formulates accurate and effective solutions, and introduces the detailed operation conditions of judging the causes of low voltage problems in the station area and formulating solutions to the problems after the analysis system is online and running with specific examples.