Abstract:Amphibious vehicle is a specific type of equipment that can travel both on land and in the water. There are a wide range of potential applications in military and civil fields because of its distinctive characteristic. Recently, with the substantial development of the intelligent technology and unmanned combat equipment, unmanned amphibious vehicles have grown significantly in importance as a key area of competition around the world. In this paper, progress of unmanned amphibious vehicles including wheel-type, crawler-type, combined type and bionic type which have been designed during the last few decades. The key technologies and the emerging concepts for unmanned amphibious vehicles are reviewed and explored in these types. It provides reference for the research of amphibious unmanned vehicles.