Abstract:The extreme precipitation event (EPE) is defined by relative index method of percent. This paper analyzes spatio-temporal characteristics by the indicators of threshold, frequency and intensity based on the daily rainfall data during growing season of rice in Heilongjiang from 1971 to 2016. The results show that high value of EPE threshold appears mainly in Central South Songnen Plain. The EPE happens mainly from May to September during growing season of rice, especially in the key reproductive growth stage of rice. During the 46 years, frequency of the EPE ranges from 18 to 72 days, showing the characteristics of meridional distribution and decreasing gradually from the east to the west. Usually, frequency of the EPE is the highest in late July over central and western regions, and that is the highest in May and September for the eastern regions. The lowest frequency of EPE is in June, so June is a safe period for rice production. As for the interdecadal difference from 1971 to 2016, the frequency is the most in recent 6 years, and the intensity is the largest for EPE, but in 1970s the situation is opposite. Thus, there is a high correlation between frequency and intensity of EPE. For small regions with rainfall observation, flood di-saster can mostly be designated with EPE, and emergence of EPE possibly indicate flood disaster.