Abstract: To improve the operation safety guarantee ability of Beijing-Zhangjiakou high-speed railway and implement the safety management and control to equipment, personnel and external environment along the railway, this paper designed the overall architecture, data architecture, technical architecture and main business functions of operation safety big data platform for Beijing-Zhangjiakou high-speed railway, and studied the key technologies of safety intelligent classification based on particle swarm optimization algorithm. It has reference significance to establish transportation safety guarantee system for Beijing-Zhangjiakou high-speed railway.