With the continuous high-level development of the national economy，the process of urbanization in China has been gradually accelerated，and mega urban agglomerations have gradually emerged. As a large-scale public transport service mode，urban rail transit has become the only way for the development of urban public transport. The connotation of urban rail transit operation service level refers to the ability to deliver the waiting passengers of each station platform to the destination on time and comfortably during the safe operation of urban rail transit in a certain period of time. In the whole urban rail transit system，the operation carrier serves for the train operation，and the operation subject is the passenger. Therefore，the influencing factors are considered from the two aspects of operation service and passenger service. Through the industry research of operation service level，the operation experience of each professional operation unit is learned，and the industry operation service level is promoted.