In order to study the welding performance of 304L(D) dual-brand stainless steel made by a company,submerged-arc welding tests were carried out on 304L(D)dual-brand stainless steel, 304L stainless steel and 304 stainless steel respectively, and the macro-examination, non-destructive inspection and comparative analysis on the structure and properties of the welded joint were carried out.The technological parameters of SAW of 304L(D) double grade stainless steel were obtained and the performance advantages of 304L(D) double grade stainless steel were verified, which can provide reference for the actual production of 304L(D) double-brand stainless steel.