Abstract: In order to understand the reliability of the humidity data derived from FY-2F satellite over the Sichuan province,FY-2F humidity data was compared with the Sounding data of eleven observation stations in Sichuan during the period 2013-2017.The correlation coefficient and the relative error between these two kinds of data were discussed,so as to analyze the applicability of the FY-2F data in Sichuan.The average correlation coefficient is range from-0.16 to 0.64,and the average relative error is range from-0.19 to-1.65.The variation of average correlation coefficient have linear trend in 300hPa,400hPa,500hPa and 700hPa.And results analysis indicates that the reliability of the FY-2F humidity data increases with the air pressure height.