Dish-shaped offshore floating type fan platform

The invention discloses a dish-shaped offshore floating type draught fan platform which comprises a draught fan, and the draught fan is connected with a dish-shaped platform. The dish-shaped platform comprises an upper platform, a hollow floating body cabin and a ballast water side cabin, the hollow floating body cabin is connected with the fan through the upper platform, the ballast water side cabin is arranged on the outer side of the middle floating body cabin in the circumferential direction, the ballast water side cabin is in a dish shape bent towards the seabed direction, and ballast water is stored in the ballast water side cabin and is communicated and exchanged with the outside; an outer stabilization mechanism is arranged on the ballast water side tank, a plurality of rotational inertia dampers are arranged below the joint of the hollow floating body bin and the ballast water side tank, and the rotational inertia dampers are connected with the seabed through a mooring mechanism. The six-degree-of-fr