The utility model provides a reserve inspection well of holding concurrently of foundation pit dewatering, relates to civil engineering technical field, and that solve is the technical problem who reduces water level measuring error and reduce the ring edge border influence of foundation ditch week. This well includes from last to the well casing, chimney filter, the sediment tube that concatenate in proper order down, reaches filter material layer, clay ball layer, backfills the soil layer, the pipe wall in chimney filter middle section wherein is waterproof to down faling into three pipeline section from last for the chimney filter, and other pipe wall of two pipeline sections permeates water to the coaxial annular baffle that is fixed with in the chimney filter middle section, the last face of baffle are fixed with an annular lower sealing cushion, being equipped with the immersible pump in the chimney filter, being fixed with the stay cord on the immersible pump, the lower extreme of immersible pump is fixed with the connecting pipe, has put an annular apron with the axle sleeve on the connecting pipe, and the lower face of apron is fixed with an annular upper sealing cushion. The utility model provides a reserve inspection well of holding concurrently of foundation pit dewatering both can regard as the foundation pit dewatering inspection well to use, can regard as the foundation pit dewatering reserve well to use again.