Through establishing a groundwater flow numerical simulation model，this paper simulated the effect of the South-North Water Diversion Project  on Quaternary groundwater of Henan Plain by correspondingly decreasing the exploitation quantity of the shallow groundwater in water received areas according to the allocated water quantity. The simulating results indicate that the water level of the shallow groundwater would be restored in some degree in the water received areas. This project would greatly decrease the exploitation of groundwater and alleviate the pressure of water shortage.