Global climate change has a significant impact on the occurrence of extreme weather events,such as heavy rain and floods. Distinguishing features of temporal and spatial variation of rainstorm events in the background of climate change is the key to response the heavy rain and flood disaster. In this paper,the Huai River basin is taken as the study area. Based on the hourly precipitation data of 229 meteorological stations from 1951 to 2012,the study,combined with the theory of statistical and meteorology,using the Mann Kendall mutation test and moving t-test as well as IDW spatial interpolation method,has analyzing the temporal and spatial evolution of precipitation,duration,intensity and frequency of isolated rainstorm events in the context of climate change. The result shows that under the influence of climate change,the occurrence time of isolated rainstorm events appear a change tendency of extremer and wider,and the characteristics of the occurrence time of isolated rainstorm events appear obvious bimodal and moving backward phenomena. Moreover,the average duration of isolated rainstorm and the duration of isolated rainstorm attaining its peak intensities have increased,isolated rainstorm events of entire basin have increased too. Global climate change makes the frequency and the duration showing a rising trend in the basin,characterized by long duration and high frequency. Especially in the last 20 years,the high incidence rainstorm areas of the Huai River basin have expanded from some areas to the whole basin.