Abstract: To avoid the non-physical phenomena caused by the train's direct start, the speed and motion of the train were controlled by a user-defined function and an overset mesh technique, respectively. Based on the IDDES turbulence model, the formation process and propagation characteristics of the wave system inside the tube of a high-temperature superconducting maglev train was studied under two operation phases, i.e. accelerating operation and uniform speed operation, revealing the spatial and temporal distribution characteristics of the wave system under the asymmetric model. The results show that, as the train accelerates forward, compression waves are continuously generated in front of the train, and eventually form a normal shock wave. During the uniform speed operation phase, the spatial flow field in front of the train presents the characteristic of a quasi one-dimensional distribution. The wake region is more complex, with the presence of complex flow phenomena such as shock waves, expansion waves, vortex pairs and their interactions. The wave system distribution in the wake region shows an asymmetry between the top and bottom when the suspension gap is considered. The wake flow structure varies considerably along the height due to the counter-rotating vortex pair. In the phase of uniform speed operation, there is a linear relationship between the length of the disturbed region and the running time.