The utility model provides a continuous casting flame-cutting cinder flushing chute having a dustpan-shaped structure, wherein chute edges are respectively arranged on the front side, the rear side and one lateral surface of the rectangular cinder flushing chute; the other lateral surface of the rectangular cinder flushing chute is opened; at least two spraying holes on which duck bill-shaped high-pressure water spray nozzles are formed on the chute edge of the lateral surface of the rectangular cinder flushing chute; and a slope of 2-5 degrees is formed between the chute bottom and a horizontal plane. By adopting a mode of flushing away molten cinder from the opened end with the slope through one-step flushing, the molten cinder falling into the cinder flushing chute during flame cutting can be completely flushed by high-pressure water without any accumulated cinder, thereby avoiding the manual cleaning, saving the cost expenditure and reducing the maintenance workload and the labor intensity, wherein the cost for each chute each year can be saved by one hundred thousand Yuan.