An analysis on the relationship between percentage of coverage of vegetation and days of sandstorm in central and western Inner Mongolia autonomous region is performed in this paper, taking percentage of coverage of vegetation and days of sandstorm as indexes and using the NDVI data of NOAA/AVHRR and meteorological observation data from earth surface. The study shows that in this area :
(1) Positive anomaly of days of sandstorm matches with the negative anomaly of percentage of coverage of vegetation in 1980’s and negative anomaly of days of sandstorm matches with the positive anomaly of percentage of coverage of vegetation in 1990’s.
(2) There is a negative interrelation between the days of sandstorm and the percentage of coverage of vegetation, which varies due to the difference of geomorphic feature and the changes of season.
The negative interrelation between the percentage of coverage of vegetation in summer(July、August and September) in sand-covering area and the days of sandstorm in the next year is of the most markedness.