The invention relates to a novel maritime search and rescue unmanned ship which is characterized by comprising an unmanned ship body, a camera, a salvage airbag and a climbing ladder, wherein the camera, the salvage airbag and the climbing ladder are arranged on the unmanned ship body. According to the novel maritime search and rescue unmanned ship disclosed by the invention, when an accident occurs, the coastguard drives a vessel carried with the unmanned ships to rush to the scene of the accident, the multiple unmanned ships are lowered onto the sea, and the search range of each unmanned ship is set; the unmanned ship is automatically driven to search and rescue the overboard personnel, the overboard personnel can be automatically recognized by the camera device and airbag unit capable of rotating by 360 degrees installed on the unmanned ship, the airbag unit is thrown to the personnel after the positions of the personnel are determined, the pulling rope is retracted after the overboard personnel are detected to climb up the airbag, the overboard personnel are pulled back onto the unmanned ship, and then the unmanned ship automatically returns to the mother vessel, so that the rescue operation is completed, and the search and rescue efficiency is greatly improved.