从分析０．３～０．５ｍｍ不锈钢薄板钨极氩弧焊对接焊缝质量入手，提出了避免烧穿的新措施。除选定合适的焊接参数并保持其稳定外，关键是防止焊接过程熔池前间隙过大，或因失稳变形产生隆起和错边，这要求装配时起弧端尽可能无间隙，而在接缝末端有１．５～２ｍｍ的楔形间隙；焊接过程熔池前方始终保持小于０．０５ｍｍ的间隙。 Based on the analysis of the quality of the butt weld of 0.3 ~ 0.5mm stainless steel TIG welding, a new measure to avoid burn through was put forward. In addition to select the appropriate welding parameters and maintain its stability, the key is to prevent the welding process before the weld pool gap is too large, or instability due to deformation of the raised and wrong edge, which requires the assembly of the arc as much as possible without gap, The end of the joint has a wedge-shaped gap of 1.5 ~ 2mm; welding process always keep the molten pool gap less than 0.05mm.