A fully-automatic unfolding, packing and palletizing machine, comprising an unfolding and packing machine (A) and a carton box palletizing machine (B), wherein the unfolding and packing machine (A) comprises a carton box conveying device (A1); the carton box palletizing machine (B) comprises a palletizing manipulator (B2) and a palletizing and conveying device (B1); the palletizing and conveying device (B1) is located in front of the palletizing manipulator (B2); the palletizing and conveying device (B1) comprises a feeding transverse conveying mechanism (B10); a feeding end of the feeding transverse conveying mechanism (B10) is connected to a discharging end of the carton box conveying device (A1); one side of the feeding transverse conveying mechanism (B10) is provided with a transitioning transverse conveying mechanism (B12); the transitioning transverse conveying mechanism (B12) and the feeding transverse conveying mechanism (B10) are connected in a conveying manner; one side of the transitioning transverse conveying mechanism (B12) is provided with a discharging longitudinal conveying mechanism (B14); the discharging longitudinal conveying mechanism (B14) and the transitioning transverse conveying mechanism (B12) are connected in a conveying manner; a first palletizing space (B7) and a second palletizing space (B8) are provided; the palletizing manipulator (B2) is configured to transfer carton boxes from the discharging longitudinal conveying mechanism (B14) to the first palletizing space (B7) and the second palletizing space (B8) characterized in that, both the feeding transverse conveying mechanism (B10) and the discharging longitudinal conveying mechanism (B14) are located in front of the transitioning transverse conveying mechanism (B12) such that the transitioning transverse conveying mechanism (B12) is located between the palletizing manipulator (B2) and the discharging longitudinal conveying mechanism (B14), wherein the first palletizing space (B7) is between one side of the discharging longitudinal conveying mechanism (B14) and the feeding transverse conveying mechanism (B10); and the second palletizing space (B8) is on the other side of the discharging longitudinal conveying mechanism (B14), such that the first palletizing space (B7) and the second palletizing space (B8) are distributed on two sides of a discharging point of the discharging longitudinal conveying mechanism (B14). both the feeding transverse conveying mechanism (B10) and the discharging longitudinal conveying mechanism (B14) are located in front of the transitioning transverse conveying mechanism (B12) such that the transitioning transverse conveying mechanism (B12) is located between the palletizing manipulator (B2) and the discharging longitudinal conveying mechanism (B14), wherein the first palletizing space (B7) is between one side of the discharging longitudinal conveying mechanism (B14) and the feeding transverse conveying mechanism (B10); and the second palletizing space (B8) is on the other side of the discharging longitudinal conveying mechanism (B14), such that the first palletizing space (B7) and the second palletizing space (B8) are distributed on two sides of a discharging point of the discharging longitudinal conveying mechanism (B14). <EOS>