The invention discloses a high-strength hard alloy with titanium carbide as a main component and a preparation method of the high-strength hard alloy. The titanium carbide serves as a main material, part of tungsten carbide is added as a hard phase, the titanium carbide and the tungsten carbide are mixed with a cobalt and nickel mixture serving as a binding phase, and the high-strength hard alloy with the titanium carbide as the main component is manufactured. The high-strength hard alloy with the titanium carbide as the main component is prepared from, by weight, 55-70 parts of titanium carbide, 20-45 parts of tungsten carbide, 0-5 parts of cobalt, 8-20 parts of nickel, 0-5 parts of molybdenum and 0.01-0.5 part of vanadium carbide. Firstly, the titanium carbide and the tungsten carbide are mixed into solid solutions, the molybdenum (Mo) is added in the manufacturing process of the solid solutions, the metal molybdenum changes into molybdenum carbide in the manufacturing process of the solid solutions, wettability of the binding phase on the hard phase is improved, the titanium carbide and tungsten carbide solid solutions are mixed with the binding phase and trace element vanadium carbide, and a mixed material is made; and the glue joining of the mixed material, pressing and forming are performed, and finally sintering and forming are performed.