Abstract: The study- was conduct on the seasonal patternof population bunch area of Stipa brevitlora, Artemisia frigida andpeak value in September. Under ditterent grazing intensities, the bunch area of Stipa breviflora increased with grazingintensity, and there was significant difference between grazing intensities. The bunch area of Artemisia frigida transformedfrom increasing to decreasing in CK block, and the peak value was observed in August. In grazing blocks, the bunch areaincreased month by month, and the peak value was observed in September. Under different grazing intensities, the buncharea decreased significantly with the grazing intensity- increasing in each month. The variation tendency of bunch area ofCleistogenes songorica had no great differences with Artemisia frigida.