Taking 2 cases as the examples and based on the characteristics of being near to the recharging source, thick aquifer and strong permeability, the study was made on dewatering technology for deep foundation pit along river in the dewatering scheme selection, dewatering design, dewatering well construction and the effects on the surrounding buildings and underground water, in order to provide the reference to the similar projects in the area of Qiangang of Capital Steel Company.