研究了非连续石墨纤维增强镁基复合材料热性能（λ、α）与纤维含量、成形。艺、温度、热循环等因素的关系。研究表明，随着纤维含量的增加，复合材料热导率（λ）下降，而热膨胀系数（α）得到改善。成形工艺在很大程度上影响重合材料热性能，存在着既能保持良好导热性能，又能获得良好热膨胀性能的最佳工艺。 The thermal properties (λ, α) and fiber content of non-continuous graphite fiber reinforced magnesium matrix composites were investigated. Art, temperature, heat cycle and other factors. The results show that with the increase of fiber content, the thermal conductivity (λ) decreases and the thermal expansion coefficient (α) improves. Forming process to a large extent affect the thermal properties of composite materials, there are both good thermal conductivity, but also get good thermal expansion of the best technology.