During the process of traditional training on athletes' training mode, due to the lack of comparable training data and the calculation model with higher calculation efficiency, the feasibility of training plan cannot be assessed accurately. Therefore, the sports training simulation system is designed in this research. This system consists of the human-computer communication system, object library, model library, knowledge base, intelligent control system and analytical interpretation system. By collecting relevant training plan indicators of athletes, such as the past training performance data of athletes, the training status data of athletes, time data indicating athletes' training indicators and physical index data of athletes etc., the preferred plan for the comprehensive evaluation on training mode can be further improved, and the suggestions about optimizing the training content can be provided through simulation system, thus the data support can be provided to the decision maker of the training plan.