To improve the thermal conduction properties of fluoropolymer(F2314), the F2314 was modified by multi-walled carbon nanotubes(MWCNTs).The F2314/MWCNTs composites were prepared by a internal melt mixing method.The effects of MWCNTs content and temperature on the thermal conductivity of F2314/MWCNTs composites were studied.A thermal conduction model for F2314/MWCNTs composites was established.The results show that the thermal conductivity of F2314/MWCNTs composite increases with increasing the MWCNTs content.When the mass fraction of MWCNTs is 0.30, the thermal conductivity of F2314/MWCNTs composite at 30 ℃ is 0.647 W·m^-1·K^-1, which is 3.43 times higher than that of pure F2314.The dependence of thermal conduction property of F2314/MWCNTs composite on the temperature is closely related to the phase transition of F2314.With the increase of temperature, the thermal conductivity of F2314/MWCNTs composite increases firstly, then reaches a maximum near the glass transition temperature, and then decreases gradually.The theoretical calculated results according to the modified model of effective medium approach and experimental ones have a good consistency, indicating that the formula can effectively simulate the thermal conduction property of F2314/MWCNTs composite.