Vacuum extruding machine for packaging machine

The utility model discloses a vacuum extruding machine for a packaging machine, which belongs to the field of packaging extruding machines and comprises a workbench, rail grooves are symmetrically arranged on the upper surface of the workbench, a sliding plate is slidably mounted above the workbench, the bottom of the sliding plate slides on the rail grooves, a boss is arranged at one end of the sliding plate, and the boss is arranged on the workbench. Frames are symmetrically arranged at the end, away from the boss, of the workbench, sliding blocks are vertically installed in the frames in a sliding mode, threaded rods are vertically installed above the sliding blocks through bearings, the threaded rods are screwed and penetrate through main bodies on the frames, rotary knobs are arranged at the tops of the threaded rods, and a top plate is arranged on the front sides of the upper portions of the two frames. The top plate is parallel to the workbench, a pressing plate is installed between the two sliding blo