Abstract: To address the problem of insufficient positioning accuracy for equipment during on-site operations in railway station yards, this paper designed a self-organizing network positioning system for railway station yards based on the BeiDou-3 Global Navigation Satellite System. It fused high-precision positioning technology, data processing and fusion technology, high-precision three-dimensional scanning technology, and self-organizing network communication technology to realize accurate positioning, data interaction, and intelligent management and monitoring of operating personnel and equipment in the railway station yard working environment and operation process, and carried out field verification in Guangzhou Guotang Freight Yard. The results show that the system effectively improves the operational safety and efficiency of the railway system and provides a reference for digital operation management in railway station yards.