One-way air exhaust type negative pressure tension-reducing scar-removing patch

The invention relates to the technical field of medical auxiliary instruments. The one-way air exhaust type negative pressure tension-reducing scar-removing patch comprises a patch film and a flexible porous material layer, and further comprises a tension-reducing device, and the tension-reducing device comprises two sub-patch films which are oppositely arranged left and right and a tightening mechanism used for controlling the distance between the two sub-patch films; two ends of the flexible porous material layer are respectively connected with the two sub-films; the pasting film covers the periphery of the tension reducing device; the flexible porous material further comprises a one-way exhaust valve, and the one-way exhaust valve is installed on the pasting film or the flexible porous material layer. The one-way exhaust valve comprises a one-way ventilation film layer. According to the invention, integration of the tension reducing device and the negative pressure scar removing film is realized. And throu