Abstract: Based on the hourly precipitation data of 52 meteorological stations in summer(from June to August) over Jilin province form 2006 to 2015, the commonly used meteorological statistical methods are applied. we analyze the diurnal variation characteristics of precipitation in summer over Jilin province by using four precipitation indices(hourly precipitation, hourly precipitation frequency, hourly precipitation intensity and precipitation duration).The results showed that the spatial distribution of total precipitation and number of days in summer over Jilin province was related to latitude and altitude, showing a decreasing trend from south to North. The spatial distribution of precipitation intensity decreases with increasing altitude. The distribution of hourly precipitation, precipitation frequency and precipitation intensity in Jilin province showed a bimodal distribution, with the peak areas being 17:00-19:00, 4:00-6:00 and 17:00-19:00 respectively. In summer, the first total precipitation was 1-3h short-time rainfall, the second was long continuous precipitation, the least was 4-6h continuous precipitation. The peak of precipitation occurred in 17:00 of 1-3h short-time rainfall, the long continuous precipitation peak appeared at 20:00 and 4-6h continuous precipitation peak occurred in 1:00.