Unchecked excavation of wild herbal medicines causes the damages of the ecological environment in the Gannan grassland

Based on field survey, this study comprehensively discussed the damages of the ecological environment caused by unchecked excavation of wild herbal medicines in the Gannan pasture, from performances of unchecked excavation, grassland destruction, reduction of conservation water, locally economic sustainable development. And then this study proposed the protective principles of right place and time for wild herbal medicines, which would provide information for sustainable use of wild herbal medicines by checking the excavation of wild herbal medicines.