A composite material having a function of isolating heat and combustion supporting gases is disclosed. A layered structure of the composite material includes a carbon-silicon foam layer, a first acrylic resin layer, a glass fiber cloth layer, a second acrylic resin layer, a first silicone layer, a carbon fiber layer, a second silicone layer, a quartz wool layer, and a third silicone layer. Due to the layered structure of carbon-silicon foam material, glass fiber cloth, carbon fiber and quartz wool, the composite material can provide functions such as heat insulation, combustion-supporting gases insulation, heat conduction, and anti-breakdown for protecting lithium-ion batteries from thermal runaway.