The work aims to achieve the stacking of products of different models on the automatic production line for package stacking by classification, so as to effectively improve the production efficiency, reduce production costs and improve the working environment, in view of the development tendency of modern package processing enterprises’ product diversification. Through the systematic analysis on the package stacking requirements of PE particles, PVC, rice and other granular materials, the automatic classification-based stacking system was studied in the method of visual guidance. According to the actual situation of different production lines, the design of stacking process was optimized, and a combination stacking method with PLC as main controller to control working process and the robot controlling the handling trajectory was put forward; and the design of corresponding hardware and software systems was completed. After testing, the mean time between failures of the production line was 960 h, which met the actual production needs. Production practice shows that the system, featured by a rigorous structure, stable running and high production efficiency, can properly meet the production requirements of enterprises.