For the present situation of seriously over-exploited groundwater resources and the rapid declining level of groundwater in the Minqin Oasis in the lower reach of Shiyang river,as well as the induced effects of ecology and environment, the concept and calculation method of ecological water demand for restoration level of groundwater were provided,then ecological water demand for restoration level of groundwater from 2000 to 2019 is forecasted.Some applicable measures which can restore the level of groundwater and ecological environment were developed according to the features of the oasis.