Marine high-altitude exposed platform and mounting method thereof

The invention provides a marine high-altitude exposed platform and a mounting method thereof. The marine high-altitude exposed platform comprises a frame body, a sling, a first connecting structure and a second connecting structure, the sling is connected with the first connecting structure and the upper end of the frame body, and the first connecting structure is used for connecting the sling and a hull structure located above the frame body; the second connecting structure is used for fixing the lower end of the frame body; during working, the frame body is located outside a ship body structure, and the second connecting structure connects the rear side of the frame body to the ship body structure. The frame body is hung on the outer side of the hull structure, the hull structure and the frame body are fixed through the second connecting structure, a fixed high-altitude exposed platform is arranged on the outer side of the hull structure, the structure is simple, installation is convenient, and meanwhile th