In order to analyze the reliability and applicability of soil moisture products in the Qinghai-Tibet Plateau,the soil moisture data measured at a depth of 5 cm below the ground in the Qinghai-tibet Plateau were used. Combined with a variety of evaluation indicators including Correlation Coefficient R, root mean square error (RMSE), Bias and unbias root mean square error (ubRMSE), this paper conducted researches on the applicability of soil moisture active-passive detection satellite (SMAP), advanced microwave scanning radiometer 2 (AMSR2) and Fengyun-3B from two aspects of time and space. The results indicated that (1) all kinds of soil moisture products could reflect the changes of soil moisture in the Qinghai-Tibet Plateau. In the season with more precipitation, the accuracy of the three kinds of soil moisture products decreased to different degrees. (2) The inversion effect of soil moisture products in summer and autumn was better than that in winter and spring, and it was closer to the measured value in autumn. Among them, the SMAP could reflect the seasonal variation trend of soil moisture in all regions, while generally overestimated it in summer and underestimated in winter; the AMSR2 underestimated soil moisture in summer and significantly overestimated soil moisture in winter; FY-3B generally underestimated soil moisture in summer. (3) The results of soil moisture products inversion were good in Naqu and Shiquanhe areas. The correlation between the soil moisture products and measured data was the highest in Naqu; while in Maqu, the correlation coefficient was higher, but RMSE and Bias were also higher, the overall accuracy was poor. The SMAP met the target accuracy in the Ngari region. To sum up, the inversion results of SMAP products were relatively stable in the Qinghai-Tibet Plateau, and were less affected by climate and environment, with the relatively large R and small RMSE and Bias.