The invention discloses a high-temperature cracking furnace for waste. The high-temperature cracking furnace for the waste comprises the following components: at least one cracking furnace body which is used for burning the waste, a vortex secondary burning chamber which is used for absorbing the smoke which is formed during burning and enabling the smoke to rotate in a vortex pipeline and be subjected to secondary burning, a tail gas purifying device which is used for purifying secondarily-burned smoke, and an exhaust pipe which is used for exhausting the smoke which is purified through the tail gas purifying device. The cracking furnace bodies, the vortex secondary burning chamber, the tail gas purifying device and the exhaust pipe sequentially communicate with one another. According to the high-temperature cracking furnace for the waste, the waste can be burned in the cracking furnace, the smoke which is formed during burning is conveyed to the vortex secondary burning chamber, the smoke rotates and flows in the vortex secondary burning chamber and meanwhile is assisted in burning, the combustible gas in the smoke is secondarily burned, and therefore the smoke is burned sufficiently, the smoke which is burned sufficiently is conveyed into the tail gas purifying device to be purified and then is exhausted through the exhaust pipe. The high-temperature cracking furnace for the waste can improve the burning efficiency, burning is sufficient, and toxic substances in the smoke are reduced.