Abstract: Hebei plain is one of the main production foodstuff area in China and which main supply water is from exploiting groundwater. The foodstuff total yield increased continuance in markedness drives the exploitation of groundwater increasing continuance in Hebei plain for last 50 years. In this increase process of the foodstuff yield to drive the groundwater exploitation, the saving water in irrigation farmland relaxes the increase rate of the groundwater exploitation so that open up space of the foodstuff yield increase on the basis of exploiting groundwater. To increase each 10000t of wheat and corn has increased 0.14×108m3 the groundwater exploitation before 1977 and has increased 0.04×108m3 the groundwater exploitation since 1978. Therefore, the importance route of relaxing the status of exceed exploiting groundwater in Hebei plain will develop to fight a drought and to save water crop energetically also to regulate agriculture planting structure in reason.