Three-fulcrum servo variable hydrofoil attack angle high-speed ship and control method thereof

The invention relates to a three-fulcrum servo variable hydrofoil attack angle high-speed ship and a control method thereof. The high-speed ship comprises a main ship body, and the bottom of the main ship body is rigidly and fixedly connected with an underwater propelling assembly through a supporting rod; the number of the supporting rods is at least three, at least one supporting rod is located below a bow of the main ship body, at least two supporting rods are located below the two sides of a stern of the main ship body respectively, and the underwater propelling assembly is arranged corresponding to the supporting rods in a matched mode. The underwater propelling assembly comprises a hydrofoil attack angle transmission rotating disc, a hydrofoil, a propeller, a propeller connecting rod and a waterproof motor, the hydrofoil attack angle transmission rotating disc is embedded in the hydrofoil and rotationally connected to the supporting rod, the hydrofoil attack angle transmission rotating disc is meshed an