Abstract: Grassland rodents seriously threaten the sustainable development of pasture husbandry in China. Monitoring grassland rodents with 3S technologies plays an important role in grassland rodents control and management. Using 3S technologies and field survey data, the main factors influencing the occurrence of grassland rodent hazard in Qinghai were used to build grassland rodent monitoring models. The threshold of the rodents region ranged from 0.344 1-0.378 2, and the thresholds of different rodent regions differed at different rodent hazard levels. The rodents area was 1.80 times larger than the area provided by the field survey and covered 99.95% of the area from the field survey. The model can well simulate the rodents area in this study region. The model simulation with 3S technologies can provide decisive support for grassland rodents management, and plays a pivotal role in protecting grassland productivity effectively and in realising the sustainable development of grassland animal husbandry.