Printing paper packaging box conveying device

The utility model discloses a conveying device for printing paper packaging boxes. The device comprises a base and a walking mechanism, wherein two mounting frames are arranged at the upper end of thebase; the opposite side walls of the two mounting frames are jointly connected with a handle; sliding grooves are formed in the opposite side walls of the two mounting frames; multiple sets of firstlimiting grooves are formed in the inner side walls of the two sliding grooves correspondingly, sliding mechanisms matched with the first limiting grooves are arranged in the two sets of sliding grooves correspondingly, baffles are fixedly connected to the opposite side walls of the two sliding mechanisms jointly, clamping mechanisms are arranged on the two mounting frames correspondingly, and extending plates are arranged on the outer side walls of the two mounting frames correspondingly. The cart is reasonable in structural design, the area of the cart can be expanded, meanwhile, the phenomenon that the extension pla