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借鉴国内外实际地形条件下的太阳辐射计算方法,基于数字高程模型,建立了任意地形实际天气下30min太阳辐射估算模型。在此基础上利用2008年9月—2009年6月祁连山高山区马粪沟流域实测辐射资料对模型精度进行了验证,并分析了模型误差来源。结果表明,由于DEM数据误差造成30min太阳辐射模型计算的遮蔽度与实际的遮蔽度存在一定差异,导致模拟结果在靠近日出后和日落前误差较大,利用实测的日照时数计算的遮蔽度,能明显改善模拟精度。总体来说,模型整体精度较高,流域内3点验证结果R2均达到0.9以上。“,”Based on DEM（digital elevation model） data,a distributed model for calculating 30 min solar radiation under actual weather and terrain condition is established.In the model,the domestic and overseas estimating methods of solar radiation are used.The performance of this model is validated using 30 min total radiation data at 3 sites in mountainous region of Mafengou river basin of Qilian Mountain region from September 2008 to June 2009.The result shows that the error of DEM can induce the error of calculated shade,which in turn induced the error of calculated total radiation near sunrise and sunset is big.Using the actual shade data of the 3 validated points,the performance of model are improved a lot.Over all,the validated results show that R2 are all above 0.9,which means the 30 min solar radiation model is applicable over other regions.