The invention discloses an anisotropic titanium nitride ceramic film and a preparation method thereof. The anisotropic titanium nitride ceramic film is composed of uniform-lattice-orientation single-layer titanium nitride nano lamellar crystal grains, wherein the crystal face of the lamellar crystal grains (111) are arranged and piled in parallel to the film surface to form the titanium nitride ceramic film with texture orientation. The preparation method comprises the following steps: (1) putting Ti3AlCl2 ceramic powder in hydrofluoric acid, and corroding to obtain Ti3C2 ceramic powder; (2) cleaning the ceramic powder, and carrying out ultrasonic peeling to obtain single-layer Ti3C2 nanosheets; (3) centrifugating the Ti3C2 nanosheets, and carrying out vacuum filtration to obtain a Ti3C2 ceramic film precursor; (4) drying to obtain a Ti3C2 ceramic film; and (5) carrying out high-temperature nitridation treatment on the Ti3C2 ceramic film to obtain the target product. The Ti3C2 ceramic film precursor is subjected to heat treatment to implement in-situ nitridation at high temperature, thereby obtaining the anisotropic titanium nitride ceramic film with favorable electric conductivity and high hardness.