Abstract: The energy consumption of traction power supply in urban rail transit power supply system is affected by factors such as train operation strategy, operation timetable compilation, line cross section design. A set of traction energy consumption simulation analysis model and multi-vehicle traction power supply model are developed by using multi\|train simulation technology. The single-vehicle driving strategy and the energy-saving optimization technology of multi-vehicle cooperative traction based on operation timetable are studied. The simulation results based on Hefei Rail Transit Line 1 train operation data show that the benefit of the optimization technology is evident, with the comprehensive energy-saving effect up to 5%.