The invention provides a double shock-absorption soundproof supporting component used for a heat-preservation floor. The double shock-absorption soundproof supporting component is characterized in that the position in contact with the ground is provided with a base, the bottom face of the base is provided with cushion bases, a rubber buffering washer is arranged between each cushion base and the base, the base is provided with a foam buffering piece, a slot is formed in the foam buffering piece, a flange A is arranged in the slot, the lower end of a metal supporting column is in threaded connection with the inside of the flange, the upper end of the metal supporting column is in threaded connection with the inside of a flange B, and the flange B is arranged in a slot in a floor bearing part. Due to the fact that the metal supporting column is connected with the flanges, vibration of the floor above is transmitted to the foam buffering piece below and is transmitted to the base after being reduced by the foam buffering piece, and vibration is further reduced through the rubber buffering washers. According to the double shock-absorption soundproof supporting component, the floor is arranged on the ground, certain space is reserved between the floor and the ground, air can effectively absorb noise transmitted above the floor and a good soundproof function is achieved.