Based on meteorological data from 21 weather statio ns in Hebei Province from 1980 to 2006,spatiotemporal characteristics of sand-dust weather and its influence factors are analyzed .Analyses indicate that dust-blow ing is the dominating type of sand-dust weather.In spatial scale,the occurring frequency of sanddust weather decreases from west to east,with the highest values in northwest and south and the low est in east .Different sand-dust weathers have different hig h-frequency centers .Periodicity of climate change is the main reason causing annual and seasonal changes of sand-dust w eather .The coupling character of gale and sand-dust source determines the spatiotemporal distribution of sand-dust weather .In time scale,three kinds of sand-dust weathers take on a trend of annually fluctuating decrease and seasonally occur most in spring .