Graphene heating film as a planar heating element has many advantages: large heat dissipation area, fast thermal response, energy saving and environmental protection, can be made into complex structure and shape, with long service life, good reliability, easy installation and maintenance and other characteristics.According to the working temperature ,Electric heating film is divided to three types : high temperature film (> 800 ° c), medium temperature film (250-800 ° c), low temperature film (< 250 ° c).At present,the products of warmtact related to electric heating film have reached more than 800 kinds.