Abstract: In view of the problems occurred in the process of water injection wells in the study area of Ordos basin, the oil well is prone to appear early water breakthrough, water flooding, rapid production decline and low recovery. By using the water breakthrough characteristic curve, the water breakthrough characteristics of a single well in the study area were analyzed, the water breakthrough types were determined, and different solutions to the different types of water breakthrough were put forward. The results show that the development in the early stage belongs to the strip type of water breakthrough. In the middle stage of development, the fractured blocks belong to the fractured water breakthrough type, while the non-fractured blocks belong to the water-coning water breakthrough type. At the later stage of development, the whole block belongs to a stratified water breakthrough type.