The invention relates to a cord thread winding type reducing arc flexible tube with large displacement compensation capacity. The two ends of an arc flexible tube body are connected with flange joints. The two ends of the arc flexible tube body have different drift diameter sizes, the arc surface of the arc flexible tube body is an axisymmetric and tapered arc surface relative to the central axisof the arc flexible tube body, and the drift diameter size of the flange joints is matched with the drift diameter size of the arc flexible tube body at the connecting end. The arc flexible tube bodyis a single arc tube body arching outward in the radial direction, the circular arc radius of the arc tube body is equal to the circular arc chord length of the arc tube body, and the two ends of thearc tube body are in circular arc transition with the flange joints. The arc flexible tube body sequentially comprises an inner rubber inner, a framework layer and an outer rubber layer from inside tooutside, and the inner rubber layer and the outer rubber layer are rubber layers. The flange joints adopt a three-flange integrated flange joint structure and is integrated with the arc flexible tubebody by vulcanization. The cord thread winding type reducing arc flexible tube with large displacement compensation capacity can be used for reducing flexible connection of a pipeline and has good large displacement compensation capacity and vibration reduction impact resistance capacity.