Urban storm waterlogging has close relationship with extreme rainsfall events.In order to understand the causes of urban rainstorm waterlogging, the paper used the daily rainfall data of Haikou station from 1953 to 2012, and analyzed the evolution law of extreme rainstorm events in Haikou by the method of linear trend estimation, Mann-Kendall trend test, Mann-Kendall mutation test and wavelet analysis.The result shows that the extreme precipitation indexes of Haikou appeared a rising trend, but the number of extreme precipitation days had no obvious change in the last 60 years. So the intensity of short durative rainstorm has increased and brought greater pressure to city waterlogging.The mutation year of extreme rainfall events was around 2007, which indicated that the land development and utilization of Haikou had a node in 2007. The periodicity of rainfall was not very significant.