Packaging box conveying device with width-adjustable supporting box

The utility model discloses a packing box conveying device capable of adjusting the width of a supporting box, which belongs to the technical field of packing boxes and comprises a fixing frame, bearings are clamped on the left side surface and the right side surface of the inner wall of the fixing frame, an adjusting component is arranged in the two bearings, and a driving motor is arranged at the left end of the adjusting component. According to the packaging box conveying device capable of adjusting the width of the supporting box, by arranging a first electric push rod, a side plate, a limiting plate, a sliding block, a first sliding groove, a first telescopic rod, a second electric push rod, a sliding rod and a movable plate, the first electric push rod is controlled to extend, and the size of the supporting box composed of the sliding rod, the second sliding groove, the movable plate and a containing plate is adjustable; and a second electric push rod is controlled to extend, the second electric push ro