NCEP/NCAR reanalysis dataset and CMAP rainfall data are used to analyze the transition of East Asian general circulation from winter to summer and its features. The results show that in late March the thermal difference of troposphere between the East Asia and West Pacific has turned from warm in east and cold in west to warm in west and cold in east. The anticyclone over the land in lower troposphere shifts eastward, leading to the reversal of related pressure contrast. At the same time, the southerly sets up in lower troposphere. The corresponding vertical circulation also has its seasonal transition done. Moreover, it has continuous rain over the south of Jiangnan region and to the north of South China in late March. All these features indicate that the East Asian general circulation has transited from winter status to summer status.