Paperboard box nailing device

The utility model provides a paperboard box nailing device, which belongs to the technical field of paperboard box nailing production and comprises a supporting seat, a supporting frame arranged on the side face of the supporting seat, a fixing rod arranged at the top of the supporting frame, a box nailing device arranged at the side end of the fixing rod and a sliding adjusting mechanism arranged at the side end of the supporting frame, and the sliding adjusting mechanism comprises a sliding groove strip block, a fixing plate and a sliding groove. A sliding groove is formed in the side end of the fixing plate, a first clamping assembly is arranged in the sliding groove, a second clamping assembly is arranged at the side end of a sliding groove strip block, each of the first clamping assembly and the second clamping assembly comprises a fixing sliding block, a clamp piece, a supporting rod and a spring, the fixing sliding blocks are arranged in the sliding groove strip block or the sliding groove, and the sup