Power generation device for ship

The utility model relates to a power generation device for a ship. The power generation device comprises a left-right through flow guide cover, a power generation assembly arranged in the flow guide cover and a connecting assembly arranged on the flow guide cover and used for connecting the flow guide cover with a ship body. The flow guide cover comprises a cylindrical cover body which extends in the left-right direction, the caliber of the cover body is gradually reduced from left to right, and the power generation assembly is fixedly arranged at the small-caliber end of the cover body; the connecting assembly comprises a fixing rod, one end of the fixing rod is used for being hinged to a ship body, the left end of the cover body is rotationally connected with the fixing rod, and the cover body rotates relative to the fixing rod along the central axis of the fixing rod. The high-pressure and high-speed fluid is formed in the cover body, then the rotor of the power generation assembly is driven to rotate rapi