The utility model discloses a paddle-type fluid-circulating tumbling-barrel for a tumbling machine, which comprises a barrel body, a taper ring, a tension band, a race, refrigerating paddles, an internal duct and an external duct, wherein multiple refrigerating paddles are fixed on the inside surface of the barrel body, each refrigerating paddle is composed of an inner wall and an outer wall and comprises a heat exchange fluid outlet and a heat exchange fluid inlet, and a heat exchange fluid flowing cavity is formed between the inner wall and the outer wall; the internal duct is in the shape of an unclosed circular ring, and communicated with the heat exchange fluid inlet of each refrigerating paddle; and the external duct is in the shape of a closed circular ring, and communicated with the heat exchange fluid outlet of each refrigerating paddle. According to the utility model, the cross section of each adopted refrigerating paddle is of a sandwich V-shaped structure, and the sandwich is in a long flat shape and has a small interval. The capacity is minimized as far as possible under the condition of ensuring an enough circulation area, in such a way, on the one hand, the storage quantity of required heat exchange media can be reduced; and on the other hand, an effect that heat exchange media are detained on the skin in the process of flowing can be reduced, thereby increasing the heat exchange efficiency. The heat exchange area is large, and the heat exchange area of each paddle can be up to one square meter.