Abstract:By analyzing the meridional variation of atmospheric motion over polar high latitude of the Northern Hemisphere,the circulation variation of the Northern Hemisphere polar low at the 100hPa level,the longitudinal motion variation of polar low at the 200hPa and the 850hPa level near the equator and so on,the synchronization or the high correlation between the variation period of atmospheric motion and that of lunar tide generating force field was revealed.That those known statistical phenomena,such as the quasi synchronous variation of global subtropical high,the 6-7 day periodic oscillation of subtropical high over the Weat Pacific,the about 14 day oscillation of general circulation of atmosphere,the about 7 day and about 14 day weather natural period and so on,are the results of lunar tide generating force field affecting global atmosphere.