Marine sail with connected composite sail blades and mast

A marine sail with composite sail blades connected with masts is characterized in that a first mast is fixedly connected with a first sail blade, the first sail blade is sequentially provided with a lower-layer transverse structure, a middle-layer transverse structure, a middle-upper-layer transverse structure and an upper-layer transverse structure from bottom to top, and the upper-layer transverse structure is directly welded and fixed to the first mast; the middle-layer transverse structure, the middle-upper-layer transverse structure and the first mast are connected through adjusting pads in a welded mode. A supporting plate is arranged in the connecting area of the third mast and the third sail blade in the circumferential direction of the third mast and supports the third sail blade, and a pressing plate is arranged above the supporting plate and on the top of the third mast and presses the top of the third sail blade. And the connection form of the second mast and the second sail blade is the same as t