With the improvement of computing power, the numerical simulation of Tropical Cyclone (TC) has adopted a large number of Large-eddy Simulations (LES), and its horizontal resolution has reached the order of 10 m, while the vertical resolution of the numerical model has not improved much. The question is how does the vertical resolution of the numerical model affect the Tropical Cyclone Large-eddy Simulation (TC-LES)? In this study, idealized Tropical Cyclone simulations are carried out using the WRF (Weather Research and Forecasting) model. To discuss the effect of vertical resolution on TC-LES with 42, 69 and 90 model vertical levels. It is found that the vertical resolution of 42 levels is clearly inadequate, while the vertical resolution of both 69 and 90 levels can simulate detailed TC small-scale organized structure of the boundary layer, with more tornado-scale vortices appearing. Compared with the N69 experiment, the N90 experiment simulates weaker TC and fewer tornado-scale vortices. But the simulated TC intensity is more stable and the simulated small-scale vortices are more detailed.