A method of fabricating a nano composite material includes: forming an intermediate product by loading nano-sized reinforcing materials into an inside of a tube and arranging the nano-sized reinforcing materials in a linear direction; canning the intermediate material by inserting the intermediate material into an inside of a can and sealing the can; evacuating a gas contained in the can; melting the intermediate product in the can by heating the can; preheating a mold; and loading the can into the preheated mold and pressing the mold.