This paper analyzed precipitation climate background and weather system in Maqu County of Gansu Province. The results showed that 80% of the precipitation was caused by mesoscale convective cloud cluster. To this end, it overviewed the MCSs activities characteristics of the Qinghai-Tibet Plateau, and the relationship between its large-scale environmental conditions and precipitation. It' s found that the center intensity of ice water path of lower cloud layer in Qingnan Plateau and Maqu convective cloud was 223 - 245 g/m2, greater than its in Longnan and Southern Shaanxi. But the upper cloud layer optical depth on the contrary, it' s only 8 in Maqu, it was 44% of Shaannan' s and Longnan' s, this was obviously related to higher altitude in plateau. Maqu large precipitation produced by convective clouds, precipitation efficiency was smaller, that was about 19% -40%. The potential of artificial precipitation enhancement was higher than its in cold front cloud band, but less than the Cuban tropical convective cloud, it was 39. 7%.%分析了甘肃省玛曲县降水的气候背景和天气系统,结果表明,80％的降水是由中尺度对流云团造成.为此,综述了用卫星云图分析青藏高原MCSs活动的特征及其大尺度环境条件和降水的关系,发现青南高原和玛曲对流云团的低云冰水路径,其中心强度为223～245 g/m2,大于东侧的陇南和侠南,而高云光学厚度则相反,玛曲仅为8,是陇南和陕南的44％,显然与高原海拔高度较高有关.玛曲的大降水多由对流云团产生,降水效率较小约为19％ ～40％,人工增雨潜力应比冷锋高云带大,但小于古巴热带对流云的增雨率39.7％.
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