The continuous ink supply system can only be applied to piezoelectric printers, and the ink cartridge consumables used are just ordinary ink plastic boxes. Although the cost of continuous ink supply is reduced through the pipeline, in winter, the pipeline becomes hard, the ink can't keep up, and the car can't move, which is very harmful to the printer. The placement of external ink cartridges that are continuously supplied will also affect the printing effect. Due to the gravity of the earth, putting the ink cartridge too high will lead to ink leakage, and putting it too low will make it impossible to print. There are many connection points everywhere, which are easy to leak, resulting in poor ink supply, the printer can not work normally, and the external ink cartridge is placed too high, which will lead to a large amount of ink entering the printing nozzle, causing the printing nozzle to burn down and the whole printer to be scrapped.