The rainy season in China is mainly regulated by the annual cycle of East Asian summer monsoon (EASM), showing a significant year-to-year variation. Based on the daily precipitation in China and the atmospheric reanalyzed data, we analyzed the trends of EASM onset, withdrawal and duration, as well as the rainy season in China during 1961?2020. Our results show the EASM onset and withdrawal has advanced and delayed by 3.54 days and 1.64 days, respectively. And the duration has increased by 5.18 days per decade since 1961. The rainy season in China has changed before and after1999 with spatial differences. In contrast to the past two decades (1977?1998), the onset of rainy season in recent years (1999?2020) has advanced mainly in the eastern part of the Northeast China, Qinghai-Tibet Plateau and the north of Northwest China, where the advanced rainy onset was 5 days earlier, and exceeded 20 days in some areas. The withdrawal of rainy season has delayed more than 10 days in northeast of the Qinghai-Tibet Plateau, north and west of the Yangtze River. The change of onset and withdrawal resulted in a sharply increased rainy duration in northeast of Qinghai-Tibet Plateau, north of Yangtze River, and the southeastern part of the Northeast China, where the rainy length became more than 15 days longer and more than 25 days in some areas. The warming surface air temperature (SAT) around Lake Baikal with enhanced upper-level anticyclone in April are the key to the onset advance of the EASM and the rainy season in China. The warming of the northwest Pacific Ocean SST in October with enhanced subtropical anticyclone in the northwest Pacific are the key factors leading to the withdrawal delay of the EASM and the longer rainy season in northern China. When the warming of SAT and SST in these two regions are superimposed with the La Ni?a events, the duration of EASM and the rainy season in China becomes much longer on interannual time scale.