The robot palletizer is applied to various case-shaped for automatic convey, tidy, and palletizing operations. The case body is automatically conveyed into the differential conveying line, and it is automatically arranged by the rotary conveying device according to the requirement, then it is pushed into the designated position by the automatic pushing mechanism, the pallet is automatically conveyed to the specific position through the conveying line, and the case is arranged under the robot operation. Automatic stacking of the finished cases are carried out under the operation of the robot and it is ready for storage. The machine push type can be selected as continuous action or single cycle action, the operation adaptability is high. At the same time, it is applicable to the packing operation of the package of the back section of various drinking articles. It adopts PLC programmable computer automatic controller, photoelectric switch, travel switch, pneumatic control and other control systems. The accuracy of mechanical action is high and the operation is easy. The palletizing system uses high-precision robot operation, which is stable in operation, less in failure.