Sliding rail box sleeving full-automatic packaging machine

The utility model relates to a full-automatic packaging machine for a sliding rail sleeve box. A sliding rail folding mechanism lifts and translates a rear sliding rail and places the rear sliding rail on a front sliding rail to be folded into paired sliding rails; the sliding rail feeding mechanism pushes the paired sliding rails falling from the sliding rail folding station to the box sleeving station; the box piece adsorption mechanism adsorbs the vertical box pieces on the conveying device through a first suction cup, and the first suction cup turns over to enable the adsorbed vertical box pieces to be converted into upward-adsorbed horizontal box pieces. The box folding mechanism adsorbs the horizontally-arranged box pieces released by the upward adsorption through a second suction cup and pulls the horizontally-arranged box pieces downwards, and the horizontally-arranged box pieces are unfolded into a box by touching a box forming device; the box folding mechanism is used for sequentially converging an