Abstract: KTX reversed field pinch experimental device main support is composed by the flexible support and support platform, and mainly used to support the weight of vacuum chamber, the conductor casing and the toroidal field coil. In view of the main supporting structure’s importance, the main support stress distribution and deformation and critical load under different structural parameters were obtained through finite element analysis and theoretical analysis on the main support for the strength analysis and stability analysis. The results demonstrate the feasibility of the main supporting structure and provide a theoretical basis for subsequent optimization-based support.