In the field of industrial manufacturing, laser welding technology has become one of the core processes for metal processing thanks to its high precision and high efficiency. In laser welding, the selection of shielding gas directly determines welding quality. Nitrogen, featuring stable chemical properties and low cost, is widely adopted as shielding gas. Against this backdrop, manufacturers of nitrogen generators for laser welding play a vital role by delivering efficient and reliable nitrogen producing equipment to underpin laser welding processes. This article systematically analyzes the core value of laser welding nitrogen generators from three dimensions: technical principles, industry applications and key selection criteria.