随着经济的快速发展,酸雨已成为危害人类健康的生态环境问题之一.作为最大的发展中国家,中国的工业化和城市化进程加快,酸雨引起的环境问题日益受到各界人士的广泛关注.为了更好地了解酸雨的时空变化动态,本文使用ArcGIS 10.2对1998-2018年中国酸雨的监测数据进行了研究分析.结果表明,我国酸雨城市的比例、酸雨频率以及酸雨面积均有所下降,但形势依然严峻.中国酸雨类型以硫酸型酸雨为主,但与1998年相比,2018年SO42-/NO3-的浓度比从11.7下降到2.1,整体呈下降趋势,表明硝酸盐对降水酸度的贡献逐年增加.本研究有助于我们了解我国酸雨的分布特征和成因,可为我国酸雨的防治提供参考.“,”With the rapid development of the economy, acid rain has become one of the major environmental problems that endanger human health. Being the largest developing country, the environmental problems caused by acid rain are of increasing concern with the rapid industrialization and urbanization in China. Recently, many researchers have focused on acid rain. To better understand the temporal and spatial dynamics of acid rain in China, the monitoring data on acid rain from 1998 to 2018 were studied using ArcGIS 10.2. The results show that the proportion of acid rain cities, the frequency, and the area of acid rain were decreasing, however, the situation still remains serious. Overall, the chemical type of acid rain was mainly sulfuric acid rain. However, the concentra- tion ratio of SO42-/NO3- decreased by 81.90％ in 2018 compared with 1998, and presented a decreasing trend, which indicates that the contribution of nitrate to precipitation acidity has been increasing year by year. This research will help us to understand the distribution characteristics and causes of acid rain in China, and it may provide an effec- tive reference for the prevention and control of acid rain in China.