Taking the rivet nut made of new austenitic stainless steel as the research object,the finite element simulation model of riveting process of riveted nut was established based on ABAQUS and SolidWorks software.Combining with finite element analysis and experimental research,the effects of sandwich thickness on the morphology of riveted upsetting head,the pull-out force of riveted nut and the tensile properties of riveted joint structure were explored.The influence mechanism of sandwich thickness on riveting deformation and mechanical property of riveting structure was analyzed.The finite element simulation results are consistent with the experimental results,and the maximum pullout force increases at first and then decreases with the increase of sandwich thickness.The results show that when the thickness of the interlayer is 3.5 mm,the riveting structure can bear the largest pull force,and the tensile performance of the whole connection structure is the best.