In order to compensate the stress variation of sealing surface of the cryogenic orbit ball valve when the temperature changes in working condition,a compensation structure was proposed,which could be used in the ultralow temperature condition.According to the transmission characteristics of orbit ball valve,the value rod was designed as two sections.An elastic component with the energy storage function was designed between the up and down value rod components to compensate the seal deformation caused by the temperature difference in the working condition.The design and calculation method of the compensation structure was introduced.Simulation calculations confirmed that the compensation structure could greatly improve the reliability of sealing in the low temperature.