Vertically used ship power propulsive device

The invention belongs to the technical field of ships, in particular to a vertically used ship power propulsive device. The vertically used ship power propulsive device consists of a spiral screw propeller, a guiding fin, a guiding fin shaft, an engine output shaft and a bracket, wherein an engine device is arranged on the bottom surface of a ship body; the engine output shaft fits the spiral screw propeller through the bottom surface of the ship body; the bracket is sleeved outside the spiral screw propeller and is fixed on the bottom surface of the ship body; the guiding fin is welded on the guiding fin shaft; and the guiding fin shaft is in sliding fit with the bracket. The invention adopts a power transmission structure that the engine output shaft fits the spiral screw propeller through the bottom surface of the ship body and the guiding fin shaft is in sliding fit with the bracket, which breaks away a common practice that a traditional power shaft transversely passes through the tail of the ship, subver