The ceramic heater is a high temperature and long life span heater. It can satisfy more and more temperature requests in the modern industry, especially when the heat treated material is new resin, chemical engineering and fiber, industrial plastics and so on. The ceramic knuckle heater was made by heat proof ceramic pieces which were drilled through by the spiral resistance wire exactly. It can be bended and has a beautiful metal cover. Ceramic fiber constitutes a heat resistant layer. Then an effective strip heater which is high temperature proof and high power density was formed. It was designed flexibly and easy to install.