The utility model discloses a full-closed multifunctional soundproof room, and belongs to the technical field of soundproof equipment. The full-closed multifunctional soundproof room comprises a soundproof room body, and a plurality of universal wheels are fixedly installed at the bottom of the soundproof room body; the totally-closed multifunctional soundproof room comprises a soundproof room body and two sets of supporting mechanisms, each supporting mechanism comprises a side connecting box, two hydraulic rods, five supporting rods and a supporting plate, the side connecting boxes are fixedly connected to the outer surface of one side of the soundproof room body, the two hydraulic rods are both fixedly installed on the tops of the side connecting boxes, and the five supporting rods slidably penetrate through the inner bottom walls of the side connecting boxes. The stable parking and flexible movement of the soundproof room body are automatically switched, when the soundproof room body does not need to move, the universal wheels are prevented from making contact with the ground, the parking stability of the soundproof room body is improved, when the soundproof room body needs to move, the position and direction are easily adjusted through the flexibility of the universal wheels, and the soundproof room body does not depend on a carrying tool; and the labor cost for moving the soundproof room body is reduced.