The post-stage packaging line for oral liquids is designed to adapt to the actual space of the factory, allowing for flexible layout and installation of equipment. Through systematic control, all devices are coordinated to operate in unison, achieving automation in various processes such as automatic tray separation, automatic straw insertion, automatic light inspection, automatic labeling, automatic tray placement, automatic box packing, automatic 3D wrapping, automatic case packing and sealing, automatic bundling and packing, and automatic palletizing. The packaging process is also assisted by visual detection and identification to distinguish defective products. This comprehensive solution for the packaging process of oral liquids greatly saves the investment in human resources and significantly improves the production efficiency and automation level of the production line, while also enhancing product quality.