Abstract: Telescope is an important tool for astronomical observation, and the larger the aperture, the higher the resolving power, which in turn determines the size of the universe that can be observed by humans. Compared with the traditional ground-based large-aperture telescopes, the vehicle-mounted telescopes are more adaptable to weather and environment and more efficient in observation. Vehicle has strict requirements on the overall quality and size of the telescope; as the aperture of the telescope increases, the mass increases geometrically, and the structure of the vehicle-mounted platform is also more demanding. In this paper, the carriage platform of a large optical telescope is studied, and different design solutions are compared with each other through the finite element analysis to obtain a better carriage platform structure so as to meet the requirements of the increased telescope aperture for the carriage.