Accurate calculation of stress and deformation during launch and bearing capacity evaluation are crucial to standardization and serialization of adapter ring.By deviding the mechanical action on the ring into the linear launch overload and the nonlinear clamp contact,a finite element model with contact analysis was constructed in ABAQUS software,and analyzed by sequential steps to achieve convergence.The results show that clamp constraint has a significant impact on adapter ring stress and deformation,and that the maximum bearing capacity of the ring can sustain a 3 500 kg satellite with 2 m high in centroid.