High-entropy alloy with high hardness, high strength, wear resistance, corrosion resistance, high temperature heat stability and other excellent performance owing to the metal - metal interface between the natural characteristics of high entropy alloy and aluminum alloy ,has a good wetting interface. In this paper, AlSiTiCrNiCu high-entropy alloy particles were used as the reinforced phase to reinforce aluminum alloy in order to study the effect of high-entropy alloy volume fraction and sintering temperature on the thermal conductivity of the composites. The result shows that the thermal conductivity of (AlSiTiCrNiCu) p / 6061Al composites decreases with the increase of the volume fraction of AlSiTiCrNiCu particles, and the thermal conductivity of (AlSiTiCrNiCu) p / 6061Al composites is 61.59 W / (m ? K) , Compared to the matrix 6061Al alloy decreased by 52%. When the volume fraction is 10%, the thermal conductivity of the composites decreases with the sintering temperature, and the thermal conductivity of the composites is 65.80 W / (m ? K) when the sintering temperature is 540 ℃. By TEM analysis, the type of the interface between high-entropy alloy and aluminum alloy is the diffusion interface and it doesn’t occur any interface product , which contributes to the reduction of thermal conductivity.