The invention provides a surfacing process for a crystallizer foot roller and a workpiece clamping tool and belongs to the technical field of welding processes. The surfacing process for the crystallizer foot roller is characterized in that the surfacing work is conducted on the surfaces of workpieces by means of an union melt welding method and comprises the following operation steps of a, machining before welding, b, workpiece clamping, c, transition layer segmented surfacing, d, workpiece cooling, e, primary wear-resistant layer surfacing, f, secondary wear-resistant layer surfacing and g, thermal treatment after welding. According to the surface surfacing process for the crystallizer foot roller and the workpiece clamping tool, by improving an existing surfacing process and a workpiece clamping tool, the purposes of reducing bending deformation of the workpieces, improving the surface hardness uniformity of the workpieces and improving the fatigue resistance of the repaired workpieces are achieved.