Scour caused by ship propeller jets is one of the major concerns of open quay structures. The current domestic port and waterway engineering specifications do not involve the calculation of the relevant flow velocity and the design of the stability of the anti-scour protective block stone. Domestic researches related to ship propeller scour are mainly for solid vertical quay structures，but research on open quay structures scour problem is rare. By analyzing the research results of foreign specifications and propeller jets，and taking the calculation of the anti-scouring block size of an LNG terminal as an example，the anti-scouring design method of the permeable wharf under the action of the ship′s main propeller and lateral thruster are summarized，which provides the basis for similar projects.