After years of development,China’s reforming reactor manufacturing technology has become increasingly mature,and the shell steel has been domestically produced,but the welding material of the shell is mainly imported and its localization does not synchronize with the localization of shell material. In this paper,the main shell of the 12Cr2Mo1R steel reforming reactor is welded with welding materials from Harbin Welding Research Institute. All performance can meet the national standards and equipment design requirements of the reforming reactor,which shows that the quality and stability of domestic welding materials reach the level of similar foreign products,and promotes the localization of heat-resistant steel welding materials,while using domestic welding materials can greatly reduce manufacturing costs.