The utility model provides an extraction device for an under-beam supporting bracket steel pipe pile in a beach area. According to the extraction device provided by the utility model, the method of cutting off and abandoning the buried section of the steel pipe pile from the surface of the sea bed directly is avoided, material wastage is avoided, project investment is saved, and the risk of navigation is decreased. The device comprises a truss frame erected at the top surface of a beam body, a sliding mechanism extending in the length direction of the beam body is arranged between the truss frame and the beam body, a cross beam is arranged below the truss frame in a hoisting and hanging manner, the truss frame and the cross beam are arranged up and down in parallel, and the cross beam is connected with the steel pipe pile sunk into the mud of the beach area through a soft rope. The device provided by the utility model has a clear theoretical structure, is reliable and practical to apply, safe to work, convenient and fast to operate, high in construction efficiency, and can realize the character of continuous pile pulling across ranges.