利用中国地面气候资料月值数据集信息化资料中青藏高原地区具有代表性的20个站点所记录的降水日数和降水量资料，采用曼-肯德尔检验分析方法（MK检验）和小波分析的方法对青藏高原地区降水日数和降水量进行了时空分布特征的分析，并对其演变规律进行了初步的探讨。结果表明：在1980-2013年之间，我国青藏高原的年降水量与降水日数的变化趋势相反，即：年降水量随时间的推移而升高，年降水日数则随着时间的推移而减少。从1980-2013年以来的34年间，青藏高原降水日数的波动变化存在8年的周期，其年降水量存在5年和11年的波动周期；青藏高原地区降水分布由西北向东南逐渐增加，且降水日数与降水量在地区分布上呈相同的变化趋势，即降水量多的地方降水日数也大。此外，西藏地区年均降水日数与青海地区相比较大，其年均降水量也大于青海地区。
Precipitation is an important factor in reflecting climatic characteristics. In this paper, Chinese ground climate data was used, 20 sites which represent the Qinghai-Tibetan Plateau area were selected and their precipitation days and precipitation data were recorded for analysis. Mann-Kendall test analysis method (MK-test) and wavelet analysis was used to analyze temporal and spatial features and evolution of precipitation days and precipitation on the Qinghai-Tibetan Plateau. The result shows that from 1980 to 2013, there was an opposite trend between the average annual precipitation changes in Qinghai-Tibetan Plateau and the precipitation days. While the average annual rainfall increased, the average annual precipitation days decrease at the same time. Wavelet analysis by the regional annual average precipitation days of the Qinghai-Tibetan Plateau revealed that the number of precipitation days from 1980 to 2013 exist fluctuation cycle changes of 8 years. From the wavelet analysis of the Qinghai-Tibetan Plateau we can see that 5 years and 11 years is the period of fluctuation in the average annual precipitation average annual rainfall wavelet. At the same time it can be found that precipitation increase from northwest to southeast and the days of precipitation and precipitation gradually increase, too. This regional distribution shows a same trend. The average annual precipitation days in Tibet is larger while compared to Qinghai, and the average annual rainfall is also greater than the average annual rainfall in Qinghai.
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