The utility model discloses a supplementary adjustment tool of beam -pumping unit packing box, primary concern petroleum industry prodution engineering technical field. Including the cylindric tailstock, the tailstock top sets up spherical cover, annular pressure disk is provided to spherical cover top, annular pressure disk top sets up gland nut, the sphere is sheathe in and is set up the connecting cylinder, provide the 2nd flange on the connecting cylinder, the bracing piece is provided to the 2nd flange lower part, the bracing piece below sets up the fixed plate. The utility model has the advantages of it is a supplementary adjustment tool who is independent of outside the packing box, is applicable to the adjustment of all kinds of packing boxs, installs this supplementary adjustment tool additional between production tree and packing box, can eliminate the inclination between well head packing box axial lead and the oil pumping polished rod axial lead, can solve oil pumping polished rod fish tail and packing wearing and tearing because of well head axial lead and the slope of oil pumping polished rod axial lead cause to can fix adjusted packing box.