The invention discloses an unmanned ship anti-collision structure which comprises an unmanned ship body, the side face of the unmanned ship body is fixedly connected with an edge strip, the surface of the edge strip is movably connected with a compression soft rod, the other end of the compression soft rod is movably connected with a floating force air plate, and the floating force air plate is parallel to the side edge of the unmanned ship body. The side, close to the unmanned ship body, of the buoyancy air plate is fixedly connected with an anti-torsion spring. According to the unmanned ship anti-collision structure, when the unmanned ship accidentally collides with an object, the contact plate is stressed and pushes the balance plate, the balance plate is stressed to impact the buffer spring, and the buffer spring is stressed to be compressed, so that the unmanned ship is prevented from deforming after being collided, the firmness of the unmanned ship is improved, and in the process that the balance plate is pressed to move, the balance plate extrudes the outwards-protruding air bag, the area of the outwards-protruding air bag is increased rapidly, the outwards-protruding air bag extrudes the side face of the soft base, the side face of the base is expanded, and therefore water resistance is increased, and inertia after collision is reduced.