The invention discloses an intensity-increased cellular denitration catalyst and a preparation method thereof. The preparation method includes the steps of 1), dissolving a titanium source precursor; 2), dissolving a zirconium source precursor; 3), dissolving a tungsten source precursor and mixing the same with solutions in the step 1) and the step 2); 4), evenly mixing the solution in the step 3), adjusting the pH value of the solution to 8-13 prior to precipitating, filtering and washing to obtain a filter cake; 5), adding water to the filter cake obtained in the step 4) prior to tuning into slurry, and adding a vanadium source precursor for mixing prior to drying and calcinating to form powder; 6), mixing a solution formed by a molybdenum source precursor with the powder obtained in the step 5) into slurry, adding a pore-forming agent after mixing, sealing and standing and extruding to be cellular after secondary mixing, and coating nanoscale tungsten oxide on the surface after drying to obtain the denitration catalyst after calcination. With the method, intensity of the catalyst can be improved, and activity of the catalyst can be improved.