▎ 摘　　要

NOVELTY - The method involves obtaining an energy intrinsic value and base state energy of electron in material for second derivative or third derivative of atom displacement. Material phonon frequency and intrinsic vector are obtained according to the second derivative. Each phonon intrinsic mode contribution of a heat flow stable value is obtained according to non-equilibrium molecular dynamics simulation. A contribution value of each intrinsic mode to thermal conductivity is determined. A phonon scattering matrix is established according to the third derivative for calculating sound line width according to the wave vector. Material thermal conductivity contribution spectrum is obtained according to contribution value or mode thermal conductivity of each intrinsic mode to thermal conductivity for selecting phonon eigen-mode of dominant material thermal conductivity. Resonance absorption of specific frequency phonon is excited by using terahertz pulse to increase energy of specific frequency. USE - Method for measuring thermal conductivity of a material e.g. graphene used in various fields. Uses include but are not limited to chip package, photoelectric device, computer, heat conducting silicone grease, nano fluid and composite material. ADVANTAGE - The method enables changing thermal conductivity of the material without affecting other mechanical performance and realize control of the thermal conductivity of material in a simple manner. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating a method for measuring thermal conductivity of a material. (Drawing includes non-English language text).