Abstract: In order to avoid the problem of pre-weld surface cleaning affecting the instability of weld quality, the total amount of surface residue is high, which in turn leads to the entry of impurities into the weld, resulting in weld corrosion, structural damage and other quality hazards. In this paper, for the 2mm-SUS301L-DLT stainless steel materials were butt and lap joints of two standard joints for the test object, respectively, do not do any cleanup,acetone cleaning, grinding wheel grinding with acetone cleaning on the surface of the weld surface cleanup mode comparison test. The results show that: through the evaluation of the different cleaning methods to confirm the mechanical properties of the weld has little impact on the weld and the weld surface state has a direct relationship;the use of acetone cleaning on the stainless steel cleaning, the best overall effect.