Auxiliary negative pressure device used after skin flap/skin grafting repair operation

The invention discloses a skin flap/skin grafting repair post-operation auxiliary negative pressure device which comprises an attaching part and an adsorption part, the attaching part is made of a layered medical foam material attached to a wound surface, a first drainage tube is arranged in the attaching part, the adsorption part is provided with a second drainage tube, the second drainage tube is arranged in a sinus tract, and the first drainage tube and the second drainage tube are communicated with each other. One end of the first drainage tube is communicated with the end part of the second drainage tube, and the other end of the first drainage tube is connected with an external negative pressure source; the device can provide proper and stable external pressure and can also provide stable adsorption force in a wound surface, the negative-pressure vacuum environment below a skin graft/flap can make the skin graft/flap on the surface be seamlessly attached to granulation tissue of the wound surface in a m