Abstract: To understand the important influence on regional precipitation extreme events caused by the maximum continuous precipitation and the longest continuous rainy days, the maximum continuous precipitation and the longest continuous rainfall days in each month from May to September in 1951 to 2014 at Liaohe River Estuary were regarded as precipitation characteristics analysis object by using linear trend estimation and wavelet analysis. The results showed that the maximum consecutive precipitation from May to September was reducing and a time scale cycle of about 7-8 years existed. The total longest continuous rainfall days from May to September were reducing，and had a 11-year time scale cycle. The maximum continuous precipitation fluctuation at Yingkou from May to September and the longest continuous rainfall days reducing were parts of major causes of precipitation reduction at Liaohe River Estuary. The occurrence of‘extreme weather events’in precipitation was affected by the maximum consecutive precipitation from July to September.