Damping cylinder for launching and recovering device of high-speed work boat

The invention relates to a damping cylinder for a launching and recovering device of a high-speed work boat. The damping cylinder is characterized by comprising a cylinder barrel, wherein the front end and the rear end of the cylinder barrel are respectively provided with a sealing cap and a barrel bottom, a piston rod is arranged in the cylinder barrel, a disc spring is arranged on the piston rod, and a piston is arranged at the inner end of the piston rod. The centre of the sealing cap is provided with a rod hole, and the outer end of the piston rod penetrates through the rod hole and then stretches out of the sealing cap. The piston matches with the cylinder barrel in a movable sealing mode. The sealing cap and the front end of the cylinder barrel, and the piston rod and the rod hole are both in sealing mode match. The damping cylinder for the launching and recovering device of the high-speed work boat has good damping effect. The service life of a winch can be prolonged by using the damping cylinder for the launching and recovering device of the high-speed work boat. The invention is suitable for launching and recovering devices of high-speed work boats of various kinds of large ships and warships.