The invention relates to a method for preparing an ozone catalytic oxidation catalyst for treating cyanide waste water, which is characterized in that amorphous alumina is used as a carrier, and in the process of pelltizing, copper, ferrum and tin which serve as active ingredients are sprayed in form of solution, and are subjected to curing, drying and roasting to prepare a catalyst. The method comprises the following steps of: (a) dissolving metal salts of the copper, the ferrum and the tin into water to form solution; (b) putting the amorphous alumina into a rotating pelletizer, spraying the solution in the step (a) into the pelletizer to perform rolling pelltizing, and controlling the pelltizing diameter; (c) curing the particulate matters obtained in the step (b) for 3 to 24 hours under the condition of water vapor of between 100 and 110 DEG C; and (d) drying and roasting the obtained catalyst in the step (c) to obtain a catalyst serving as a finished product, wherein the drying temperature is between 50 and 180 DEG C, the drying time is between 2 and 10 hours, the roasting temperature is between 400 and 600 DEG C, and the roasting time is between 2 and 8 hours.