Using the daily rainfall data of 109 stations from 1960 to 2001, the area rainfall over the Changjiang valley is calculated with Taison polygon method, and the change trend of area rainfall for this region is analyzed. The result shows that there is a slight increasing trend of the annual area rainfall in the region. The spatial distribution of the trend coefficient of heavy rain frequency and rainfall in the region are also discussed. At most stations, annual and summer (June-to-August) heavy rain frequency and heavy rainfall show to be increasing. However, the increasing tendency is significant at a few stations. The center of the significant increase lies in Jiangxi Province.