Abstract: The multi-timescale variations of China rainfall and atmospheric circulations in recent 100 years,including the key atmospheric oscillations,W,C,E and subtropical high(SH)are studied.The relation-ships of atmospheric circulations and China rainfall on different time scales are also studied.The results are as following.Firstly,the atmospheric circulations in the lower and higher layer show the significant interannual scales,especially,the interannual variation of 7 years.And the interannual variation in lower atmospheric layer is clearer than that in troposphere but it is reverse in the more than 28 years band of period.SO and SH are the strongest signal in the interannual scales.In the more than 28 years band of period,NPO and E are the strongest signal.Secondly,the rainfall variation of China in the late 100 years shows the significant periodicity in less 3.5years,3.5 to 7years and 7 to 14 years.At last,the contemporary and previous relationship between the rainfall and high-low atmospheric layer.In the previous period,the key factors to China rainfall are W,NPO and SO,while W,NAO,AO and E are the key factors in the upper period.