Movement inhibiting apparatus for floating offshore wind turbine and floating base used for offshore wind turbine

A floating foundation for an offshore wind turbine, wherein the floating foundation is provided with a motion suppression device for the floating offshore wind turbine, and the motion suppression device comprises at least one annular stabilizing plate attached to the floating foundation and arranged horizontally surrounding the floating foundation;

• and the stabilizing plate is provided with a plurality of fin stabilizers comprising a first group of fin stabilizers arranged on one side of the stabilizing plate, and the first group of fin stabilizers are arranged vertically surrounding the floating foundation and spaced apart from each other;
• and the fin stabilizers each have an L-shaped cross section, wherein each fin stabilizer in the first group is deflected by a first angle in a width direction with respect to a straight line passing through a center of the floating foundation and an inner endpoint of the fin stabilizer, and the first angle is greater than 0 degree and less than 45 degree.