Abstract: Through technical and economic comparison, the groundwater control design of an excavation under deep pervious layer geological conditions is selected. By using the interference well group algorithm and considering the effects of pensile impervious curtain, the underground control is designed. Through engineering practice and field monitoring, the pensile impervious curtain is applied to the groundwater control design of excavations under deep pervious layer geological conditions and no strict requirements of deformation control to the surrounding environment.