Abstract: As an important part of underlying surface,cryosphere is in the process of continuous interaction with atmosphere.The present paper is mainly about the relationship between Arctic sea-ice and the precipitation of North China.It is shown that the Arctic sea-ice strong signal region is highly correlated with the summer precipitation of North China.The mechanism of how the Arctic sea-ice would affect North hemisphere summer circulation and the flood-drought of north China is put forward,namely how the Arctic strong signal region may affect the abnormal precipitation of North China is put forward.