The robot automatic palletizing system includes: box conveying system, box finishing system, robot fixture, robot system, tray conveying system, tray buffer system, etc. The product cartons are transported to the box finishing system by the box conveying system after the automatic sealing machine or film wrapping machine. After finishing and arranging, the products are captured by the robot through the fixture. The captured products are stacked layer by layer according to the product stacking requirements. After stacking, the pallets are transported to the forklift receiving point by the pallet conveying system, waiting for receiving or docking with the automatic stereoscopic warehouse. According to the production speed requirements of the system, the empty tray automatic conveying station can be configured separately, and the robot can also be used to supply the palletizing plate.