Food packaging inkjet printers are called continuous jet inkjet printers. It continuously ejects ink from a single nozzle through pressure, and after the crystal oscillates, it ruptures to form ink dots, and after charging and high-voltage deflection, the ink dots are scanned into text on the surface of a moving object. The second is the application of food packaging carton labels. Food packaging carton labels are called drop-on-demand inkjet printers. The inkjet supply system of the inkjet head consists of multiple high-precision valves. When the characters are sprayed, the corresponding font valves are quickly opened and closed. The ink is ejected under a constant internal pressure to form characters or characters on the moving surface. Graphics. It can play a great role in the logistics industry. In our daily food inkjet printers, UV inkjet printers are generally used to assign codes. UV inkjet printer can print multiple lines of information, including one-dimensional code, two-dimensional code, LOGO, graphics, variable barcode, anti-counterfeiting code, monitoring code, number, text, data point library, etc. The printed food barcode information can include information about production, storage, transportation, processing, and distribution, and it mainly includes functions such as tracking product quality, post-information traceability, and anti-counterfeiting. The information on food packaging can be marked with UV inkjet printers. This approach can improve brand image, achieve product anti-counterfeiting function, and enable effective supervision. Issues that should be paid attention to when using UV inkjet printers in food packaging. When the UV inkjet printer is not working, the recovery device returns to the nozzle position driven by the automatic movement system. The nozzle sealing technology will reliably seal the nozzle and the recovery device and is running Automatic opening during printing, thus completely avoiding the dust and impurities attached to the nozzle, effectively preventing the nozzle clogging caused by ink curing, improving production efficiency, and making the use more stable and reliable.