Abstract: The natural grassland area in Dulan County of Qinghai Province was 2 126 500 hm2, and the natural grassland had 12 types including desert grassland, mountain grassland, alpine grassland, steppe-desert, dry desert, mountain desert, alpine meadow,mountain meadow, swamp, alpine swamp,shrub meadow, and open forest grassland. Various types of grassland had different distribution, area and productivity in this county. The alpine grassland had the largest area （752 500 hm2）, while the mountain meadow had the smallest area （273 hm2）. The alpine swamp had the highest annual biomass with average production of edible fresh of 10 791 kg/hm2, while the alpine grassland had the lowest annual biomass with average production of edible fresh of 1 945 kg/hm2. The available grassland was 1 554 200 hm2 in area, and its stock capacity was 1 409 400 sheep units.