Abstract: The distributed model based on 1:250000 DEM date and metorological data for calculating solar total radiation（STR） over rugged terrains in Sichuan Province witch considered slope and aspect and the climate empirical statistical model（CESM）only based on metorological data.The result shows that:the two simulated result of the distribution of total radiation in Sichuan is similar， the range of STR result is larger than CESM， the total radiation result of STR is 7200 ～1800MJ/m²，the result of CESM is3100 ～6280MJ/m².According to the test by the observed data in 2012，the error of SRT is0.39%witch less than the CESM，the result of STR is more detailed and more conducive to view the local results than CESM.The result shows that SRT is more practical for application on solar energy resources development， power plant site selection， the installation of motor models and can provide more reference value.The solar resource in northern part in Aba， western part in Ganzi， northern part in Liangshan and Panzhihua area is more abundant，conducive to development， the small distributed generator can be applicated for the solar development in traffic inconvenience area.