CNTs/AlN ceramics were fabricated by hot-pressure sintering, and the effect of sintering aids kinds, contents on the microstructure and properties of CNTs/AlN ceramics was investigated. The phase constitution, fracture morphology and microstructure were analyzed by XRD, SEM and TEM. The result shows that sintering aids (Y₂O₃+CaF₂) were more efficient for the densification of CNTs/AlN ceramics than sintering aids (YF₃+CaF₂). As the contents of sintering aids (Y₂O₃+CaF₂) increased, the density of CNTs/AlN ceramics improved, while the properties of mechanics and thermal-conductivity decreased.