The invention belongs to the field of medical apparatuses, and particularly relates to a disposable water-absorbing and oxygen-supplying woundplast. The woundplast comprises a dressing layer, a dryinglayer and a base layer which are sequentially pasted, wherein the areas and the shapes of the dressing layer and the drying layer are the same and are smaller than those of the base layer; the dressing layer and the drying layer are arranged at the center of the base layer; medical silica gel is embedded into the drying layer; the woundplast further comprises a drainage pipe; one end of the drainage pipe runs through the base layer and is then positioned inside the drying layer, and the other end of the drainage pipe is positioned outside and is communicated with a reagent bag; the drainage pipe consists of a liquid pipe and a vent pipe of which the outer walls are fixedly connected; a control valve for controlling communication between the liquid pipe and the vent pipe or not is arrangedon the outer wall of the drainage pipe; a binding net is arranged inside the reagent bag; an oxygen donor and a color indicator are arranged inside the reagent bag below the binding net. The disposable water-absorbing and oxygen-supplying woundplast can maintain a relatively wet and oxygen-rich microenvironment for the wound within a very long time, and kills anaerobic bacteria to facilitate wound recovery.