The present invention proposes a device and method for comprehensive utilization of wind energy on merchant ships, the device comprising: A spin column, B spin column, C spin column, D spin column, E spin column, F spin column, G spin column, H Rotary columns, bases, deformed sails, platforms, platform pillars, and rails, the deformed sails of the present invention surround eight rotating columns, thereby forming a rotary sail with a larger size and a nearly circular cross section. Compared with the traditional Magnum As far as the spinner sail is concerned, the deformed sail of the present invention generates a large thrust per unit mass and has a high utilization rate of wind energy. In addition, the deformed sail of the present invention can also be deformed according to different wind directions. When the ship is sailing against the wind, the windward area of the deformed sail can be reduced, which solves the problem of large wind resistance of the traditional rotary sail when sailing against the wind. When the wind blows or the starboard side blows, its diameter is close to 2 / 3 of the ship's width, which can generate a large Magnus thrust, reduce the fuel consumption of the ship, and realize the energy saving and emission reduction of the ship.