Abstract: Based on the daily precipitation data obtained from 23 meteorological stations located in Liaoning Province during the period of 1965—2014, the analyses of the spatial and temporal variation characteristics of the heavy rainfall and rainstorm events in the study area are carried out by using trend analysis, wavelet analysis and Kriging spatial interpolation methods. The analysis results show that: ① the heavy rainfall days in the 60 s to 70 s of the twentieth century mainly showed an tendency to increase and in the 80s to decrease. The intensity of the heavy rainfall in the mid-late 1960s and early twenty-first century mainly showed a trend to increase, and it mainly showed a trend to decrease at a middle period (i.e. from 1970s to early 1980s). And both the rainstorm days and the rainstorm intensity showed a trend to stably increase after 1984; ② the periodic variation of the heavy rainfall and rainstorm events were characterized by a consistency, which covers a main period of 34 years and a secondary period of 19 years; ③ the spatial distribution of the heavy rainfall and rainstorm events showed a change characteristic of gradual decrease from the southeast (Dandong) to the northwest (Chaoyang) of Liaoning Province. In addition, as for the changes in spatial tendency, other indices showed the tendency to increase in Liaoning Province with the exception of the heavy rainfall days. The increasing range of the heavy rainfall days was almost equivalent to the decreasing range. The heavy rainfall intensity and rainstorm events have the main trend to increase in Liaoning Province. Therefore, the flood control and disaster mitigation should be focused on its central and eastern regions, because there is a greater risk of the flood disaster and surface waterlogging caused by the heavy rainfall intensity and rainstorm.