Abstract: Based on the observational precipitation data of national meteorological stations and TRMM satellite data in Shangluo area,the applicability of TRMM satellite precipitation data in Shangluo area is analyzed by using statistical analysis methods,such as correlation analysis,deviation and root mean square error for time and space scales.On this basis,the ratio coefficient method is used to correct the monthly precipitation products of TRMM satellite.The results showed that:（1）On the time scale,the monthly precipitation data of TRMM is highly linearly correlated with the observational monthly precipitation data of the stations（R ＞0.9）.（2）Comparing the monthly,seasonal and annual TRMM precipitation with station precipitation,the determination coefficient R2is more than 0.8 with a higher goodness of fit,and the seasonal precipitation has a better fit result than monthly precipitation.（3）The ratio coefficient method is used to correct the deviation of TRMM precipitation products,and the results show that the RMSE and MAE of the TRMM monthly precipitation are less than 2.0 mm and1.5 mm,respectively,the determination coefficient is close to 1.The TRMM monthly precipitation have the same trends of time series and distribution regularities with the observations,and with a higher goodness of fit.In general,the TRMM monthly precipitation tend to underestimate precipitation in month with high precipitation,on the contrary,overestimate the precipitation.Through the accuracy evaluation and revision of TRMM satellite precipitation products in Shangluo area,it provides an effective supplement for the surface precipitation data in this area.