文章利用中国东部２５个站５２４年（１４７０～１９９３年）的旱涝级别资料分析了中国东部旱涝的空间分布，比较了ＥＯＦ方法和ＲＥＯＦ方法的不同点．研究指出可用６个中心地区的旱涝情况来补充原来划分的６种旱涝型，使得旱涝中心更明确，旱涝分布更符合实际情况，突出体现了ＲＥＯＦ在旱涝型研究中的优点．最后给出了近五百年中国东部的主要旱涝中心及特征 Based on the droughts and floods of 524 stations (1470-1993) in eastern China, the paper analyzes the spatial distribution of drought and flood in eastern China and compares the differences between EOF and REOF methods. The study pointed out that the six drought and flood patterns originally divided can be supplemented by the drought and flood conditions in the six central areas, making the center of drought and flood more clear and the distribution of drought and flood more in line with the actual situation, highlighting the advantages of REOF in the study of drought and flood. Finally, we give the main centers and features of drought and flood in the eastern part of China in the past 500 years