Abstract: A bladder-type multipurpose vessel which provides a novel solution to the problems that exist in current oil tankers, such as unsafety, unitary transportation function and environmental pollution. The cargo hold of the present vessel is of the construction combined by a rigid structure and a flexible one, and the crude oil lies in a quad protection of an outer shell, an inner shell, a water cushion and spray layer, and a bladder, causing its safety to be greatly increased. Since the vessel has the special cargo hold construction and corresponding facilities to make it possible to transport both oil and water as well as goods, being of outstanding applicability, economy, safety and environmental protection effect.