本文研究了单向复合材料热导率与基体材料和纤维的种类及纤维的含量和分布的关系,并根据电热相似原理,用混合热阻模型推出了单向复合材料热导率的计算式。用定常热流法实测了纤维含量和分布各不相同的试样在不同温度下的热导率,证实了该计算式的可靠性。 In this paper, the relationship between the thermal conductivity of unidirectional composite materials and the types of matrix materials and fibers and the content and distribution of fibers are studied. According to the similarity principle of electric heating, the formula for calculating the thermal conductivity of unidirectional composite materials is derived by using the hybrid thermal resistance model. The thermal conductivity of samples with different fiber contents and distributions at different temperatures was measured by the steady flow method. The reliability of this formula was verified.