The LED light-curing device become popular in the European and American developed country that confirmed it's reliability in the light-curing domain. Nowadays, the appearing of the LED light-curing device has made up the domestic blank market. It can use the blue light of light-emitting diode to solidify the light-curing compound resin, which sensitive wave length is 420-480nm. So it provide the oral cavity branch with repairing the tooth for use. The life of light-emitting diode is so long that can reduce the maintenance cost greatly in the future. It hardly brings the heat when it works. Therefore it needn't  the ventilator for cooling, and it avoids the trouble of noise and vibration from the tradition machine. Its power source adopts the ultra large capacity lithium battery. One charge may use for a long time. It's very portable because no the electric wire. The luminous intensity uses two section of type designs, first by the weak light for illumination, then by the glare for solidification fast. This may suppress the excessive quick contraction of the resin surface, avoid appearing the fissure between the tooth hole edge. The outward appearance is designed suitably for user so that  the doctor feel kindly when operation.