Abstract: This paper builds a one-dimensional simulation model by using AMESim simulation software according to the passenger compartment and battery thermal management circuit of a new energy vehicle. The continuous cooling process of the passenger compartment in three roof states are simulated and verified, including a panoramic skylight roof, a roof adding one layer of a sunshade and a roof adding two layers of sunshades; the whole process is conducted under three working conditions of low speed, high speed and idle speed. The simulation and test results show that the installation of a sunshade can effectively solve the problem that the cooling performance of the passenger compartment of a panoramic skylight vehicle is not up to the standard in a high temperature environment, which has reference value for practical research and development.