▎ 摘　　要

NOVELTY - Multilayer composite heating film comprises a thermally conductive film layer, carbon nanotube heating film layer and heat insulating film layer, where the carbon nanotube heating film layer is arranged between the heat conductive film layer and the heat insulating film layer, the thermal conductivity of the heat conductive film layer is 300W-500 Wm-1K-1, and the thermal conductivity of the heat-insulating film layer is 0.02-0.2 Wm-1K-1. USE - Multilayer composite heating film. ADVANTAGE - The multilayer composite heating film improves heating effect of the multilayer composite heating film, so that the working time of the heating component is prolonged under the condition of not increasing the power supply weight and size. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a heating element, which comprises a circuit component and the multilayer composite heating film, where the circuit component is electrically connected to the carbon nanotube heating film layer of the multilayer composite heating film; and (2) a manufacturing method of heating components, which involves providing multilayer composite heating film, the multilayer composite heating film being the multilayer composite heating film, connecting circuit assembly with the carbon nanotube heating film layer of the multilayer composite heating film to prepare heating elements.