The invention relates to a catalyst for removing dioxin. The catalyst comprises carriers, active ingredients and an auxiliary material, the carriers are TiO2 and montmorillonite, and the active ingredients are VOx, CeOx, MnOx and WOx; the mass sum of the carriers and the active ingredients is 100%, and the catalyst comprises 80-90% of TiO2, 1-10% of montmorillonite, 0.3-0.9% of VOx, 1-3% of MnOx, 0.6-1.2% of CeOx and 3-5% of WOx. According to the catalyst for removing the dioxin and the preparation method thereof, the VOx, the CeOx, the MnOx and the WOx serve as the active ingredients, a polybasic metal cluster is formed, the activation energy required by a reaction is reduced, the efficiency of dioxin removal is improved, the montmorillonite of high quality is added, and therefore the mechanical properties such as the abrasive resistance and compressive strength of the catalyst are improved.