The invention provides a corrugated plate separating element. The sectional line of the corrugated plate separating element is divided into three segments, i.e. an AB segment, a BC segment and a CD segment, and the three segments are all smoothly connected; a lyophobic hook is respectively arranged at the wave crests E, F and G of the corrugated plate separating element, each lyophobic hook is arc-shaped, the centers of the arcs are the curvature centers of the curves at the wave crests E, F and G, and the opening of each lyophobic hook faces to the flowing direction of an airflow. A corrugated plate designed by the invention is of a streamline structure and is different from a zigzag shape, an arc shape, and the like. When a working substance flows in a flow passage formed by the streamline corrugated plate, no swirl is formed in other areas except the inside of a small hook, so that the flow resistance loss is far smaller than that of a conventional arc-shaped corrugated plate separator and is much smaller than that of a zigzag corrugated plate separator.