Digital printing is a new printing method that prints computer files directly on paper, which is different from the traditional printing process. Its characteristics: one print, no plate making, stand-by, instant error correction, variable printing, on-demand printing. Digital printing is a comprehensive technology developed on the basis of printing technology. It uses electronic text as a carrier and transmits it to digital printing equipment through the network to achieve direct printing. The lack of printing and information in the printing production process is a major feature, covering printing, electronics, computers, networks, communications and other technical fields.