Abstract: Precision re\|profiling management system of EMU wheelset is introduced. Based on the wheel wear mechanism and wheel wear data, the system establishes the wheel wear law model and the wheel re\|profiling law model, and then establishes the wheel degradation law and life prediction model. At the same time, based on the wheel failure mechanism and wheel maintenance data, the wheel polygon risk prediction model, rolling contact fatigue model are established to realize wheel failure risk prediction. On the basis of wheel wear, re\|profiling, life prediction, and risk prediction models, with the comprehensive cost of wheel life cycle maintenance as the goal, a wheel operation and maintenance decision\|making model is established, and finally the wheel condition repair and planned preventive repair are realized. The actual application proves that the EMU wheelset precision re\|profiling management system can effectively reduce the operation and maintenance costs.