Paperboard cutting machine

The utility model discloses a paperboard cutting machine which comprises a base, supporting rods are fixedly installed on the periphery of the lower end of the base, a cutting table is fixedly installed at the upper end of the base, a support is fixedly connected to the left side of the cutting table, a hydraulic cylinder is fixedly installed at the top end of the support, and a hydraulic rod is fixedly connected to the bottom of the hydraulic cylinder. A connecting plate is fixedly installed at the bottom of the hydraulic rod, a clamping and embedding groove which is vertically formed is formed in the bottom end of the connecting plate, a cutting knife is arranged in the clamping and embedding groove, an adjusting assembly is arranged at the end, away from the cutting knife, of the cutting table and comprises a sleeve, a plurality of adjusting holes are formed in one side of the sleeve, and the adjusting holes are communicated with the clamping and embedding groove. An adjusting rod is in threaded connection