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The spatialtemporal variations of wind power over Hexi Corridor are studied by means of wind data over the corridor from 1970 to 2004 and the 10minute interval intensive observation data from seven wind towers in the Gobi.The results show that the wind speed was relatively stable over Hexi Corridor; there is an obvious decreasing trend in wind speed within Oasis; there is regional difference in the distribution of wind power with two high power areas. Within 10 m above the surface, the wind power density is greater than 100 W/m2, mostly 150 W/m2 with the maximum being over 200 W/m2; and in the layer of 10 to 70 m, the wind power density increases with altitude linearly, 28 W/m2 per 10 m, over 300 W/m2 at 70 m. There are diurnal and monthly wind power variations in Hexi Corridor with the higher density in the period of February to June. The wind power density is the lowest at about 10 m above the surface around 07:00, then increases gradually from 08:00, reaches the maximum at about 18:00, then decreases again. There is abundant wind resources in Hexi Corridor area. The duration of effective wind in Hexi Corridor can be up to 6000 hours or higher, even to 7500 hours.