Abstract: Along with the much of Oil-fields development during the rich containing-water in the area of BOHAI gulf, the more and more high-mineralization stratum-water which draw out from the underground have flowed spread to the earth's surface and the local environment was damaged seriously. According to the analysis from the testing results of the groundwater, the scientific method was developed to treat with the contaminative water that put the groundwater into the shallow stratum reservoir. The matching possibility for the two types of liquid have been proved and the geological characteristics have been demonstrated by some of the testing dates. This method will help to solve the problem about the underground water which in the BOHAI gulf oilfield existed for a long time in the future.