Discussion is made on some problems in the design of recharge well for deep foundation pit engineering, according to different recharge purposes, groundwater recharge for foundation pit engineering is based on environmental control and water resource protection; the control principle, selection principles of constant recharge and constant flow recharge modes, calculation of limit pressure and designed maximum recharge pressure, maximum safe recharge water head and determination method of maximum recharge amount as well as recharge well opening time setting are elaborated.