Packaging is a step in the market of products, and all kinds of packaging machinery are used for product packaging. With the development of the economy, the requirements for the outer packaging of commodities are getting higher and higher, which also promotes the continuous development of the packaging machinery industry. Packaging machinery provides the necessary technical support to the product packaging industry to complete the product packaging process. The modernization of the packaging industry is an indispensable support. Coding equipment occupies an important position in packaging machinery, and most of the product packaging marks are based on coding. In recent years, the use of inkjet printers for marking on outer packaging has become more and more widespread. With its unique advantages, inkjet printers quickly occupy the market, and inkjet printers have become the first choice for packaging and marking automation. The inkjet printer has the following advantages on the outer packaging identification: 1. The inkjet printer has low cost, the machine cost is low, and the consumables used also meet the needs of industrialization costs. 2. The coding information is diversified. Product specifications and factory name, factory address, production date, company LOGO, barcode, contact information and other information can all be coded, and the coding information is resistant to wear and tear, which is conducive to handling, transportation and storage. 3. Automatic coding, reduce manual operation, reduce production cost, fast printing speed and high efficiency. 4. It has a wide range of applications, almost any material can be printed, and inkjet printers can be used in almost any industry. Although the inkjet printer has a pivotal position and role in packaging machinery, the inkjet technology needs to be further improved, and the inkjet printer that is more in line with market needs should be developed. The coding equipment should be high-quality, high-efficiency, multi-variety, low-cost, and high-environmental protection to obtain lasting and strong vitality in the packaging industry.