The utility model belongs to the technical field of packaging, and discloses a bidirectional labeling
machine which comprises a conveying belt, a labeling
machine body and a rolling
assembly, the two sides of the top of the conveying belt extend towards the inner side of the conveying belt to be provided with limiting guide grooves, a labeling head of the labeling
machine body corresponds to one side edge of each limiting guide groove, and the rolling
assembly comprises a horizontal rolling unit, a vertical rolling unit and a
portal frame. Vertical rods on the two sides of the
portal frame are fixedly connected with the two side edges of the conveying belt, a notch is formed in the position, below the vertical rolling unit, of the limiting guide groove, a
photoelectric sensor is horizontally installed at the position, corresponding to the notch, of the conveying belt, and the
photoelectric sensor is electrically connected with the labeling machine and the rolling
assembly. Through the arrangement of the horizontal rolling unit and the vertical rolling unit, the horizontal rolling unit can press the pasted
label along the horizontal plane, the vertical rolling unit can vertically bend and press the
label along the box edge, bidirectional pasting of the
label on the sealing edge of the box cover can be achieved, and the
production quality and efficiency are further improved.