The simulation training system for fully automatic operation of urban rail transit is a comprehensive training solution developed for the new-generation FAO fully automatic operation system of urban rail transit. It aims to resolve the contradiction between the significantly increased comprehensive quality requirements of FAO system personnel and the lack of a training system for emerging systems. The system is constructed based on the simulation of the operation principles at GoA3-GoA4 levels of the fully automatic operation system. It mainly consists of a dispatch operation simulation training system (including simulation training subsystems for vehicle dispatchers, passenger dispatchers, train dispatchers, power dispatchers, and environmental control dispatchers), a station operation simulation training system (including a trainee system for station attendants and a training system for station platforms and concourses), and unmanned train simulators. Based on the early operation experience of fully automatic operation, the system has built more than 80 typical FAO training scenarios, comprehensively covering the multi-dimensional training needs of standard operations, fault handling, and emergency drills for personnel at multiple levels such as command decision-making, organization and dispatch, and on-site disposal in the FAO system. It can greatly shorten the training cycle and rapidly improve the comprehensive quality and capabilities of personnel after the reorganization of FAO positions.