The invention discloses a titanium nitride porous ceramics filter element. The titanium nitride porous ceramics filter element comprises 10 stratiform ceramic elements of which the air porosity progressively increases in the thickness direction; the thickness of a single layer ceramic element is 10-20 mm; the size of the cross section which is perpendicular to the direction thickness of the ceramic elements is 500-1000 mm*500-1000mm; a titanium nitride element comprises titanium powder, lanthanum oxide, titanium oxide and carbon black. The invention discloses a preparation method of the titanium nitride porous ceramics filter element, which comprises the following steps: laying the raw material powder of different layers alternately and pressure forming to prepare a blank; conducting hot-press sintering in nitrogen atmosphere to obtain the titanium nitride stratiform ceramic filter element of which the single layer air porosity ranges from 17% to 79%, and the air porosity progressively increases in the thickness direction the titanium nitride porous ceramics filter element is high in melting point and rigidity, and low in density and friction coefficient, is applied widely to industrial production as a high-temperature flue gas filter material, can meet requirements of high temperature coal gas purifying process in the field of integral coal gasification combined cycles, and can avoid and reduce dust bridge formation between ceramic filter elements.