The invention discloses a single-direction curved corrugated pipe. The single-direction curved corrugated pipe comprises an integrally molded pipe body, wherein one side of the pipe body is provided with a flexible wall part which can be stretched, the other side of the pipe body is provided with a flat wall which can penetrate through the pipe body along the axis direction of the pipe body, and the flexible wall part and the flat wall are smoothly connected to form the pipe body with a hollow cavity. The pipe body is formed by smoothly connecting the flexible wall part which can be stretched and the flat wall. By adopting the structure, when the pipe body is bent, the flexible wall part is stretched, the flat wall only can be bent and play a guide effect, any position on the flat wall is bent along a specific direction, the pipe body can be bent only along one direction, the single-direction oriented bend of the corrugated pipe is realized, and the single-direction curved corrugated pipe can be used as a hollow reinforcing rib to produce an outer corrugated plastic winding structure wall pipe material.