Blowout prevention box of wearable packing

The utility model relates to a blowout prevention box of a wearable packing, which mainly solves the problem that the packing wear is fastened because the existing blowout prevention box is not provided with a lubricating device of a packing and a polish rod. The utility model is characterized in that a packing (2) is arranged in a shell (1); a press cover (3) for pressing the packing (2) is connected to the upper end of the shell (1) through a thread; an oil storing chamber (4) is arranged in the press cover (3); foams (5) are filled with the lower part in the oil storing chamber (4); lubricating oil is filled in the oil storing chamber (4); an oiling one-way valve (6) is arranged at the upper end of the press cover (3); and oil leaking holes (7) are arranged at the bottom of the press cover (3). The utility model has the advantages of that the packing wearing speed is reduced, the packing use life is prolonged, and the like.