There are many small pit in the shallow part of Xin'an Mine, most of them were mined out of the boundary, causing Daqing and Ordovician limestone water to flow into goaf of Xin'an Mine. Xin’an Mine +32, -100 level in shallow mine water, the proportion of small pit water reached 70%. In order to reduce the amount of water in the mine, the water outlets and outlet passages of the three small water outlets in the shallow part of Xin'an Mine were analyzed, the necessity and feasibility of sealing were proved. The study provided a theoretical basis for the next step of water reduction.