A circular air duct end sealing transition region anti-liquid wave suppression device includes: an anti-liquid wave suppression device end plate and a connecting plate, wherein the anti-liquid wave suppression device end plate is fixedly arranged on a circular air duct end sealing transition region flume bottom plate and has the height equal to that of an inner ring plate and an outer ring plate of a circular flume air duct along the radial direction, and the connecting plate is arranged at the end part of the circular flume air duct and takes U-shaped structure along the radial section of a circular cooling machine; the radial width of the anti-liquid wave suppression device end plate and the connecting plate are at least more than that of an air outlet of a door-shaped sealing cover plate; the anti-liquid wave suppression device end plate is a blind plate; the position between the anti-liquid wave suppression device end plate and the connecting plate is arranged on the inner ring plate and the outer ring plate of the anti-liquid wave suppression device at the bottom of the circular flume; a flexible sealing inner baffle and a flexible sealing outer baffle are respectively arranged between the inner ring plate of the anti-liquid wave suppression device and the inner ring plate of the door-shaped air duct, and between the outer ring plate of the anti-liquid wave suppression device and the outer ring plate of the door-shaped air duct; and when the door-shaped sealing device moves, the flexible sealing inner baffle and the flexible sealing outer baffle are respectively contacted with the inner ring plate and the outer ring plate of the door-shaped air duct, and relative movement exists between the baffles and the ring plates.