Abstract: The evaluation analysis of daily precipitation products derived from three numerical weather Forecasting models(T639，Japanese and German model) over the Tibetan Plateau is conducted using daily rainfall observation data in 2009 from June to September for 7 main towns in Tibet Autonomous Region(TAR) in this study．The result shows that the three kinds of numerical weather prediction model，the German model has some advantage for sunny/rainy forecasting abilities that compared to other models，vacancy rate is low．The forecasted rainfall amount of three models prediction ability Light rain is stronger，a small deviation．Three kinds of numerical weather prediction model of rain forecast is significantly weakened，the forecast magnitude The forecast magnitude too small，the German and Japanese mode basically no prediction ability．Integrated three kinds of numerical forecast model of precipitation has certain reference significance to the Nakchu in the north，Chamdo and Nyingtri in the east TAR．