Dry grinding prevention stuffing box

The utility model relates to a stuffing box in the field of petroleum exploitation, in particular to a dry grinding prevention stuffing box. According to the technical scheme, the dry grinding prevention stuffing box comprises a pressing cap, a stuffing, a box body and a base and is characterized in that an L-shaped through groove is formed in the wall of the base, a sliding block which is the same with the L-shaped through groove in shape is embedded into the L-shaped through groove, a handle is arranged on the upper portion of the outer edge of the sliding block, and an elastic band corresponds to the sliding block and is arranged on the base in a sleeved mode. A compression spring corresponds to the elastic band and is embedded into the sliding block, the dry grinding prevention stuffing box is simple in structure and quick to install, the well mouth stuffing can effectively play a lubrication role by simply changing the shape of the base of the stuffing box, the service life of the stuffing is prolonged,