According to the technical scheme of the international advanced development of various ceramic electric heater, widely used in boilers, chemical industry, shipbuilding, electric power construction, machinery and other departments of the alloy components, piping and pressure vessel welding preheating before welding construction, after welding, intermediate hydrogen elimination, annealing, the heating speed is fast, the heat utilization rate of excellent performance high, energy saving, low labor intensity, safe and reliable, convenient operation, is currently a hot field of welding local novel and practical treatment heater. Ceramic heater international generic flexible heater, it is made of high quality nickel chromium alloy wire cable, high purity alumina ceramic insulation jacket made of pieces of crawler or rope heaters and other products. It can according to the shape of the workpiece, size, and can be spliced, bending, winding close to the workpiece heating.