Abstract: An atmospheric general circulation model (AGCM) and a global coupled ocean-at-mospheric model (COAGCM) are used to test the influence of boundary changes of the sea-ice in north polar region on the monthly mean climate variability.It is shown that the anomaly of the polarice can greatly change the local climate in mid-high latitude.The cole high in mid-high latitude is strengt hened and the warm high in low latitude is weakened.In addition,the sensitivity of at mosphere to sea-ica albedo is tested by using the AGCM.Two kinds of sea-ice albedo are used.The variation of solar absorption at sea-ice surface will make the ground surface temperature and the sea-level pressure varied.The results also show that the feedback of ice and snow is very important to the climate.