Abstract: Aiming at the current situation of low accuracy of manual visual judgment of meteorological nephogram and unable to predict the specific route location affected by rainfall in railway flood control work, this paper designed railway precise flood control system based on meteorological short-impending forecast technology, described the overall architecture, data source composition, specific functions and key technologies of the system. The practical application results indicate that this system can effectively improve the timeliness and inaccuracy of traditional 24-hour weather forecasting in railway flood warning, implement the accurate identification of railway rain and water conditions and early warning of dangerous situations, effectively improve the technical level of railway flood control, and the efficiency of railway flood control management.