Cobalt ferrite nanotubes with diameter of 50nm were prepared using a simple sol-gel process within the pores of anodic aluminum oxide (AAO) template. SEM, TEM, XRD, VSM were used to characterize the morphology, crystalloid structure, and magnetic properties of the samples. The results indicate that the cobalt ferrites thus prepared were polycrystalline phase with the smooth and uniform tube-like structure. The method is also expected to be applicable to the preparation of other multicomponent oxide nanotubes.