In order to verify the reliability of GNSS-R technology in soil moisture monitoring in the Arctic coastal areas， the experiment used GNSS-R technology to carry out soil moisture inversion research at Barrow Station in Alaska in summer， and took the soil moisture in the ARM program and SMAP of the US Department of Energy as reference values， respectively， to analyze the variation characteristics of soil moisture at Barrow Station from 2015 to 2023. The results show that the GNSS-R data from 2015 to 2023 have good consistency with the SMAP and ARM soil moisture data in the long-term trend， and the correlation between the interannual results is 0.54-0.76 and 0.54-0.81， respectively， and the root mean square errors are 0.02-0.06 and 0.01-0.06， respectively. From June to September in 2015 to 2023， the soil moisture inverted by GNSS-R is most consistent with the SMAP and ARM observations in the medium-to-high humidity range （0.4-0.6 cm³/cm³ for SMAP and 0.20-0.35 g/g for ARM）. Under low and high humidity conditions， although the GNSS-R inversion results can still capture the rising trend of soil moisture， there is a certain deviation from SMAP and ARM， which may be related to the increase in summer rainfall. This study confirms the reliability of GNSS-R technology in inverting soil moisture along the Arctic coast.