A scaling model of 1∶13 for the Cring of reactor pressure vessel was established,and simulation analysis on scaling model was carried out by considering the spring wire spiral effect,elastoplastic,large deformation,and contact multiple nonlinear and coupling effects.The compressionrebound sealing behavior curve of scaling model,effective rebound and total rebound were obtained.The calculated results of the scaling model are in good agreement with the measured results,which verify the rationality of the analysis method and calculation model.The simulation analysis method of actual Cring was presented,and the compressionrebound sealing behavior parameters and curve were obtained.The performances of actual Cring are closed to the scaling model.It provides a basis for the research on sealing characteristics and engineering application of the actual Cring.