Abstract: In order to study the waterlogging of Anqing City summer maize growth and yield influence, by using a variety of agricultural meteorological data of Anqing City from 1960 to 2011, the correlation between precipitation and summer maize water requirement were studied according to the probability of precipitation (≤20% and ≥80%) and FAO (Food and Agriculture Organization). And the two methods were combined together to design the index of waterlogging for summer maize in different periods. Furthermore, the intensity of waterlogging was used to verify the index of waterlogging. The results showed that the index of waterlogging for summer maize in the growing period of Anqing City was ≥731.8 mm. The index of each ten days from early June to late September was ≥66.8 mm, ≥70.3 mm, ≥124.9 mm, ≥89.4 mm, ≥78.2 mm, ≥92.2 mm, ≥84.7 mm, ≥76.6 mm, ≥49.2 mm, ≥47.4 mm, ≥41.4 mm, ≥27.7 mm. Divided the typical years according to the index of waterlogging and the intensity of waterlogging were highly similar, and the rate of similarity reached to 81.8%. It showed the index of waterlogging was in accordance with the local situation of Anqing City and it could be regarded as practical value.