通过柠檬酸溶胶凝胶法和粉末冶金法制备了纳米结构Cu-Al2O3复合材料。使用X射线衍射仪(XRD),透射电镜(TEM)和扫描电镜(SEM)对混合粉体的结构和形态进行分析。同时对样品的密度,硬度和电学性能进行测试。结果表明:复合材料的粒度约为56～286 nm,Al2O3颗粒弥散分布在基体中。随着氧化铝含量的增加,密度及电导率下降,硬度值上升。 Nanostructured Cu-Al2O3 composites were prepared by citric acid sol-gel method and powder metallurgy method. The structure and morphology of the mixed powders were analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). At the same time, the density, hardness and electrical properties of the samples were tested. The results show that the particle size of the composites is about 56 ~ 286 nm, and the Al2O3 particles are dispersed in the matrix. As the alumina content increases, the density and conductivity decrease, and the hardness increases.