Semi-submersible platform with heave plates

The utility model relates to a semi-submersible platform with heave plates. The semi-submersible platform is characterized by comprising a quadrilateral platform body on a ship body. A vertical column is disposed at the bottom of each of four corners of the platform body. Connecting lines of the four vertical columns form a quadrilateral structure. A quadrilateral annular buoyancy pontoon is disposed on the inner sides of the four vertical columns. Each of four corner ends of the buoyancy pontoon is connected with one vertical column correspondingly. Four inner corners of a pontoon body of the buoyancy pontoon are provided with heave plate truss connectors which are connected to a heave plate truss. The heave plate truss comprises four vertical straight rods which are correspondingly hung at the heave plate truss connectors. A plurality layers of heave plates are horizontally disposed on the heave plate truss at intervals. The semi-submersible platform is good in economy and stability, excellent in heave motion performance, capable of realizing fast and simple mounting of heave plates, suitable for the requirements of different oil extraction modes such as dry oil extraction, wet oil extraction and dry-wet combined oil extraction, and promising in development prospect, and the requirements of deep-water and ultra-deep-water operations are satisfied.