In order to solve the conflict between economic development and railway transportation in our country, high-speed railway's construction has entered a period of great development, especially in passenger special line. With large-scale construction of GSM-R, some railway businesses based on GSM-R network has gradually enriched and plays an important part in ensuring safety and reliability of railway operations. Therefore, it is necessary to provide some ways to guarantee the quality of service of railway businesses. At the same time, it will be inevitable and imminent to introduce the function of business management in GSM-R Integrated Network Management System. However, due to the lack of construction experience, the research and development of GSM-R Integrated Network Management System still focus on the level of network element and network and involves little business management. That is the reason why it is difficult to meet the development's needs of railway businesses. In order to solve this problem, we can manage the quality of service of railway businesses by using the technology of SLA (Service Level Agreement) . The paper is mainly about the research and application of monitoring system of the quality of service for railway businesses based on the SLA.The process of SLA management applied in GSM-R Integrated Network Management System can be divided into three phases: the preparatory phase of business data, the implementation phase of SLA management and the maintenance phase of business management. After the discussion of theories and technologies about SLA, the paper studies three phases of SLA management respectively.
