Although the vertical structure of tropical cyclone warm core is closely related to the change of intensity, there is no direct observation of the three-dimensional warm-core structure of tropical cyclone, and how to construct the initial vortex in numerical prediction models is still a research topic. To explore the effect of vertical structure of warm core on the development of tropical cyclone, the mesoscale WRF model was used to construct three warm cores of initial vortexes with same intensity but different height for the low test, middle test and high test, respectively. The simulation result shows that the maximum wind speed radius in the low and mid tests begins to contract after 6 h and the convection in the eye wall begin developing. And the intensity of the high warm core is obviously stronger than that of the high test. The increase in intensity in low and mid tests is also faster than that in the high test, and reaches the rapid intensification. The further diagnoses show that the initial CAPE value is higher and the low-level vertical wind shear is stronger in the low test, which is favorable for convection development in the eye wall. The diabatic heating plays an important role in the formation of the high-level warm core; the contraction rate of maximum wind speed radius is faster than that the high test, and the intensity of the tropical cyclone increases rapidly. This study clearly shows that the warm core height of the initial vortex in the numerical prediction model has a significant effect on the development of simulated tropical cyclone intensity.