| Urban rail transportation is taking more and more important role on releasing urban traffic pressure. It has lots of advantages than other vehicles such as heavy capacity, fast speed, safety and less disturb. Generally, train obey arranged timetable strictly, but, for some random reason, it is hard to avoid deflection from the timetable. On urban rail transport system which has character that the headway is short, a train's delay may affect other trains, sometimes, it even affects the whole system's operation. Real time adjusting on the train's running can assure the efficiency of the whole system's work. By adapting intelligent automatic adjust method, we can avoid the traditional hand adjust method's shortcut, such as big random and high requirement for the dispatch person, we can make optimize adjust method in time and full-scale. So the research on the train's running automatic adjusting is very important. Expert system is a system based on knowledge. It mainly solves all kinds of unstructured problems. Especially, it can deal with qualitative, heuristic or uncertain knowledge information. By some illation process, it can accomplish the system goal. Based on some research production before and field survey result from urban rail transportation in Beijing, Guangzhou, Shenzhen and Wuhan, the paper advances the CBTC urban rail transportation train operation adjusting according to expert system. It uses expert system designing idea to program the solution module for CBTC urban rail transportation train operation adjusting. The adjusting methods for train operation time, state and so on are designed. The system operating and analyses the result are also simulated.By analyzing the simulation result, we can find that there have great improvements in departure from schedule through train operation adjusting. There have some integration of adjusting methods that can suit for many kinds of departure situation in urban rail transportation.
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