The utility model discloses pressurization packing box belongs to oil recovery auxiliary assembly field, the device includes that pressurization mould, two fixing bolt and sealing filler constitute, the pressurization mould include the cartridge type mould and set up along outer circularly symmetric and connect otic placodes two of cartridge type mould bottom, cartridge type mould bottom sets up the polished rod through -hole, fixing bolt include the lantern ring, screw rod and with form a complete set of screw's nut, the screw rod can pass the earhole of connecting the otic placode, sealing filler can ensure that cartridge type mould and beam -pumping unit polished rod are to the air seal under high temperature and high pressure environment, the utility model discloses pressurization packing box not only can effectively carry out the secondary seal to the well head, avoids decrment tolerance, avoids simultaneously changing reduction in production cost, easy operation, convenient to carry to the existing equipment.