The present invention relates to a composite sintering materials using a carbon nanotube (including carbide nano particles, hereinafter the same) and a manufacturing method thereof, the method comprises the steps of: combining or generating carbon nanotubes in metal powers, a compacted product, or a sintered product; growing and alloying the carbon nanotubes by compacting or sintering the metal powers, the compacted product, or the sintered product; and strengthening the mechanical characteristics by repeatedly performing the sintering process and the combining process or the generating process of the carbon nanotubes. The composite sintering materials using carbon nanotubes of the present invention have excellent mechanical, thermal, and electric and electronic characteristics as well as have effects of material cost reduction and manufacturing cost reduction due to reduced sintering temperature so that they are useful as materials for automotive parts, electric and electronic arts, space and aircraft parts, and molding and cutting tools, all of which include the composite sintering materials using carbon nanotubes.