Aluminum (Al)/carbon nanotube (CNT) composites were fabricated by combined process of SPS pre-sintering and hot extrusion. The CNTs were well dispersed onto the Al particles by a nanoscale dispersion method. The pre-sintered CNT composites prepared by spark plasma sintering were used for subsequent hot extrusion. Microstructural observations by optical, field-emission scanning electron, and high-resolution transmission electron microscope confirmed that the sintered Al/CNT compact and extruded bulk material had a good dispersion of oriented CNTs. Raman spectroscopy showed that the processing did little damage to the CNTs. It is found that the Al-CNT composite showed no decrease in elongation despite highly enhanced tensile strength compared to that of pure Al. It is thought that the thickness of boundary layer could be controlled by the amount of CNT which leads to well aligned CNT in the extrusion direction and also good adhesion between matrix and CNT due to generated aluminum carbide in Al-CNT composite.