Train cruising movement simulation module is an important part of high-speed train moving simulation system. According to the actual cruising movement characteristics of high-speed train, it is very important to design high-speed train cruising movement simulation algorithm to improve the calculation accuracy of train moving simulation system. Based on the conditions and the characteristics of high-speed train cruising movement, this paper designs a simulation algorithm for simulating high-speed train cruising movement. Finally, take the part of cruising sections in the Yueyang - Xianning and Zhengzhou - Wuhan as a study case to carry out the simulation of high-speed train cruising movement. The results show that the time error of Simulation System 2 is less than 5%, and that the control process of cruising movement simulation algorithm designed in this paper is closer to the actual cruising movement process of high-speed train.