TheGoos-Hnchenshiftis a highly sensitive refractive indexmeasuremen t method,which has great application potential in temperature and pressure sensing,but has hig h requirements for measurement accuracy.In order to solve the measurement difficulties and improve the measurement accuracy of Goos-Hnchen,Inthis paper,wedesigna prism-silver nanof ilminterface layer and builda measuring device that can measure multi-polarization state and multi-angle Goo s-Hnchenshift.The Goos-Hnchenshift of the beam at different interfaces of prism-air and prism-silver nanofilm was measured and its physical mechanism was discussed.The experimental results show that the average Goos-Hnchen shift at the prism-air and the silver nanofilm interfa ces are 2.7μm and 27.7μm, respectively.The Goos-Hnchen shift at the silver nanofilm interface isenhancedmore than 10times compared with that atthe prism-air interface.The electric field distribution a t the prism-silver nanofilminterfaceandprism-airinterface was simulated using C OMSOL multiphysics software.Theoretical analysis demonstratesthat the strong local field generated by the silver nanopar ticles enhances the evanescent field,which contributes tothe improvementof the Goos-Hnc hen shift at the prism-silver nanofilm interface.The research work provides analternativestrategyfor improving the sensitivityof thosebiosensorsbased on the Goos-Hnchenshift eff ect.