First of all, the efficiency of inkjet printers is much better than that of inkjet printers, and manual operation is no longer needed. It is the embodiment of automatic operation. Secondly, the printing effect is greatly improved, not only numbers and Chinese characters can be printed, but also graphic trademarks can be printed, and the printing effect is beautiful and generous. Thirdly, in terms of adhesion, the code printed by the coding machine is easy to fall off, and the code spraying machine (especially the small print code spraying machine) has strong adhesion and is not easy to fall off. Moreover, inkjet printers can print products of different lengths and types according to different requirements.