Abstract: In this paper, the daily precipitation data of the 115 stations in Middle East China from 1960 to 2005 are used to analyze the possible effects of urbanization on regional precipitation, especially on the Yangtze River Delta area. The annual precipitation increases in the two regions. But the increment in Yangtze River Delta area is obviously faster than in Middle East China. The rainfall variability for different seasons and different densities in the two regions are also analyzed. In spring and autumn, the precipitation decreases in the two regions. Compared to the Middle East China, the precipitation in Yangtze River Delta area decreases slower in spring, but it decreases faster in autumn. The annual precipitation of light rain decreases in Middle East China, while the annual precipitation of moderate rain, large rain, and heavy rain increases in this region. On the other hand, the annual precipitation for each level increases in Yangtze River Delta area, and the increment for moderate rain, large rain, and heavy rain are significantly faster than in Middle East China. Evidences show that the faster increment of rainfall in Yangtze River Delta area is due to the enhancement of rainfall intensity. The reason may be contributed to the fast urbanization in this area