The invention discloses a radiating material and a preparation method of the radiating material. The radiating material comprises a component A and a component B, wherein the component A is an ionic modified resin, or a mixture of more than one ionic modified resin, or a composite of more than one ionic modified resin; and the component B is one or more mixed material with the far infrared emission rate greater than 0.80 or thermal conduction coefficient greater than 5W/m.K, and grain size smaller than 30mu. In use, the radiating material can not only improve the radiating performance of metal parts, but also achieve certain other special functions (for example, self-cleaning, infrared stealth, thermal insulation, corrosion resistance, thermostability, self-lubricating, insulation and other properties), and can be prepared into most needed color according to requirement.