Computer security conversion interface device

The utility model discloses a computer security conversion interface device. Main case, a first through hole is formed in the outer side of the mainframe box; an annular first stretching body is arranged in the first through hole; a second through hole is formed in the middle of the first stretcher; an annular second stretching body is arranged in the second through hole; a third through hole is formed in the middle of the second stretcher; a third stretching body is arranged in the third through hole; support rods are arranged at the inner ends of the first through hole, the second through hole and the third through hole; the inner sides of the first stretching body, the second stretching body and the third stretching body are connected with springs; limiting plates are hinged to the positions, close to the edges of the through holes, of the outer sides of the mainframe box, the first stretching body and the second stretching body, and a plurality of external connectors are arranged on the outer annular face