关键词: 网络安全, 安全测评, 测评体系, 铁路, 三位一体

Abstract: To study the cybersecurity evaluation of railway business system. On the basis of sorting out the current national cybersecurity standards and railway regulations for cybersecurity assessment. Analyze the gap between the current cybersecurity assessment work carried out by the railway and the requirements of national standards. Put forward the concept of safety assessment based on the trinity of classified cybersecurity protection assessment, risk assessment and security assessment. Based on the concept of the trinity form the whole life cycle of the railway system of network security evaluation model and evaluation system，which provides reference for the cybersecurity detection.

Key words: cybersecurity, security assessment, assessment system, railway, trinity