In the context of increasing attention to environmental protection and sustainable development in the world,green printing with environmentally friendly ink as the core is gradually being admired,which is of great significance for reducing environmental pollution due to its low toxicity and easy degradation.The purpose of this paper is to discuss the characteristics,applications and challenges of environmentally friendly inks,and put forward corresponding optimization strategies,in order to promote the wide application of environmentally friendly inks and promote the green transformation and sustainable development of the printing industry.