The utility model provides a lug type bridge foundation wave reducing device, which relates to the bridge construction technology. The device comprises big lugs and small lugs, wherein the big lugs and the small lugs are fixed on the side surface of a bridge foundation, and are arranged in 2.5 to 3.0 times of the design wave height region along the vertical direction of the side surface of the bridge foundation; and the center position of the height of the region is parallel to the design level of the bridge foundation. A plurality of big lugs are arranged in the transverse direction and the vertical direction in an array mode, and a plurality of small lugs are arranged among adjacent big lugs; and the big lugs and the small lugs are polyhedrons. The convex height of each big lug is 0.05 to 0.2 time of the design wavelength, and the convex height of each small lug is 0.125 to 0.25 time of that of each big lug. The big lugs and the small lugs are made of reinforced concrete, corrosion resistant composite materials, and the like. When waves attack the bridge foundation, the lug type bridge foundation wave reducing device can reduce the pressure peak of the waves acting on the bridge foundation; and in addition, the device also has the advantages of simple structure and convenient implementation.