The article explores the significant role of generative AI in achieving sustainable development in 3D printing. It elaborates on how generative AI can optimize designs, reduce material waste, and create lightweight structures, thereby enhancing the environmental friendliness of 3D printing. The article analyzes application cases of this technology in industries such as architecture, fashion, and automotive, and summarizes the challenges faced by these sectors, as well as the ongoing technological innovations and collaborations between tech companies and environmental organizations. It concludes that generative AI presents a promising solution for achieving sustainable development in 3D printing.