In the design of stainless steel welding, the size and quantity of welding seams should be reduced as much as possible; Ensure that the weld is symmetrical with the central axis of stainless steel weldments and components, and the position of the weld is as close as possible to the central axis of the components to avoid excessive centralized distribution of the weld; When there are many welds in stainless steel components, the welding sequence should be arranged scientifically and reasonably. For the distortion of those long members, the clearance and groove angle can be calibrated by improving the assembly accuracy of the members and the flatness of the steel plate. In order to ensure that the longitudinal deformation of the web wing and the angular deformation of the weld are consistent with the length direction of the component, the longitudinal shrinkage deformation of the weld should be compensated by the method of reserved length of the component on the basis of ensuring the accuracy of arc pointing or centering. The angular deformation after welding is controlled by reverse deformation before welding; In order to solve the problem of large thickness of T-joint, fillet weld is adopted. When both sides can be welded, double-sided symmetrical groove can be used; When multi-layer welding is adopted, the welding sequence symmetrical to the neutral axis of the component can be adopted; The welding method of double-sided shielded welding with small heat input is preferred to effectively reduce the welding area and ensure the integrity of the weld.