Studies have shown that global precipitation patterns have changed in the context of warming, with a general decreasing trend of light precipitation and a significant increasing trend of intense precipitation in some regions. However, there is a lack of systematic studies on the variation of precipitation at different levels, especially on the regional scale. Based on precipitation data from 838 meteorological stations in China, this paper investigates the trends of precipitation at different levels in China from 1961 to 2020 and the relationship between their interdecadal component and ocean oscillation factors. The result shows that the spatial distribution of precipitation variability in China varies considerably. Light precipitation only predominantly increases in western northwest China and the Qinghai-Tibet Plateau, and significantly decreases in southern China and southwest China; moderate intensity precipitation decreases significantly in eastern part of southwest China increased in the rest of China; extreme precipitation increases in most regions, with decreasing trends only in Beijing-Tianjin-Hebei region and parts of Chongqing. In most regions of China, the contribution of light precipitation (light rainy days) to total precipitation is dominated by a decrease, while the contribution of moderate intensity rainy days and extreme precipitation (extreme rainy days) is dominated by a significant increase, the contribution of extreme precipitation in each region shows an opposite interdecadal variation to the contribution of moderate ntensity precipitation and light precipitation. The changes in the number of light rainy days and the number of moderate intensity rainy days dominate the changes in the number of total rainy days, the changes in the amount of moderate intensity precipitation and the amount of extreme precipitation dominate the changes in total precipitation. Further, it is found that on the interdecadal scale, the correlation coefficients between precipitation at different levels and Pacific Interdecadal Oscillation (PDO) in most of China tend to be negative with increasing levels, while those with Atlantic Multidecadal Oscillation (AMO) tend to be positive with increasing levels. Interdecadal abrupt changes in the correlation between precipitation at different levels and PDO/AMO in each region occurred mainly in the 1980s to 1990s.