The invention relates to the technical field of offshore
pile foundation protection, and discloses an
offshore wind power pile foundation anti-scouring device which comprises a fixed sleeve, a movable sleeve and a
spoiler. The fixing sleeve comprises a sleeve, a supporting plate and a water baffle, the sleeve is provided with a center hole allowing the
pile foundation to penetrate through, the supporting plate and the water baffle are arranged at the two ends of the sleeve at intervals in the axial direction of the center hole, the supporting plate is used for being supported on a
seabed, and the water baffle is perpendicular to the center line of the center hole; the movable sleeve is rotationally assembled on the outer side of the sleeve around the center line of the center hole, the
spoiler is fixedly assembled on the outer wall, away from the fixed sleeve, of the movable sleeve and used for driving the movable sleeve to rotate around the fixed sleeve, and the maximum distance between the
spoiler and the center line of the center hole is larger than that between the water baffle and the center line of the center hole. By simultaneously weakening the influence of three factors of downstream
water flow in front of the pile,
water flow carrying around the pile and trailing vortex disturbance behind the pile on the pile foundation, the anti-scouring purpose is achieved, and the safety of the
wind power pile foundation is improved.