The utility model relates to a ground auxiliary device is used in oil gas well exploitation operation, specifically says to relate to an oil well is used liquid and is held sour pond. The utility model discloses an oil well is used liquid and is held sour pond includes the body, still is provided with the baffle in the body inner chamber, and tapping chamber and last sap cavity are separated into with the body inner chamber to this baffle, communicates each other at the smart filtration pore bottom the baffle through the setting between tapping chamber and the last sap cavity, and tapping intracavity portion still is provided with casting tube and swash plate, and this swash plate one end is connected with the body lateral wall, and this swash plate other end is located the smart filtration pore department in body bottom surface to form the inclined plane of a slope. Through setting up the swash plate, make acidizing fluid impurity wash more easily, prevent to influence the acidizing effect, effectively prevent simultaneously the pollution of impurity, improved the acidizing effect for the acidizing operation is more convenient, more high -efficient.