Abstract: The Ecological Water Transport is an important way to restore the damaged ecosystem in arid areas, and groundwater function evaluation is the basic work to understand the recovery of arid areas. On the basis of the existing groundwater function evaluation index system, a set of index system suitable for the typical study area, Qingtu Lake, which is China's Northwest Hexi corridor Shiyang River rump lake, was established in order to understand the changes of groundwater function after ecological water transporting, using three aspects including powing, responsiveness and state to show the groundwater function changes of Qingtu Lake. In addition, The membership chart was established for each index, and the groundwater functions before and after ecological water transporting in Qingtu Lake were weighted and evaluated by AHP-Entropy Weight Methods. The results show that the power and responsiveness of groundwater function in Qingtu Lake restore extremely after ecological water transporting; However, because the ecological environment restoration is a long-term process, the state has restored a little slow. It is suggested that ecological water transportation and restricted exploitation should be continued so that the ecological environment of Qingtu Lake tends to restore. The research results can provide scientific basis for the planning and rational utilization of groundwater in Qingtu Lake, and lay an important foundation for the sustainable utilization of groundwater in Qingtu Lake.