The utility model provides an oil field return water separates oxygen and handles dispensing device, including controlling dispense jar (7) and sewage treatment jar (1) that the interval set up, it is equipped with stirring leaf (9) in jar (7) to dispense, the jar (7) that dispenses is connected with the drive unit who is used for drive stirring leaf (9) rotatory, it is equipped with fillet transition steel sheet (13) to dispense between bottom plate and the lateral wall of jar (7), also be equipped with fillet transition steel sheet (13) between the bottom plate of sewage treatment jar (1) and the lateral wall, this oil field return water separates oxygen and handles dispensing device is still including being used for the liquid conveying in the sewage treatment jar (1) to jar (7) interior liquid pump (4) of dispensing. This oil field return water separates oxygen and handles dispensing device safety ring guarantor, low cost, operation simple process can eliminate or suppress the activity of bacterium in the oil field extraction sewage, reduce the influence of metal ion such as fe2+ to polymer solution viscosity.