Constant-pressure oxygen pillow

The utility model provides a constant pressure oxygen pillow which comprises an oxygen pillow body and an oxygen pipe communicated with the inside of the oxygen pillow body, and further comprises a metal spring piece pasted on the surface of the oxygen pillow body, and the rewinding starting end of the metal spring piece is far away from the oxygen pipe. Through the arrangement of the metal spring piece, after oxygen is gradually consumed, the metal spring piece is gradually rolled back, the volume of the oxygen pillow is automatically reduced, it is guaranteed that the pressure of the oxygen in the oxygen pillow is constant, and residual oxygen can be recycled and stored without manual extrusion and discharge; the metal pressing strip is arranged at the rewinding starting end of the metal spring piece, and the metal pressing strip is driven by the metal spring piece to roll the oxygen pillow, so that the oxygen pillow does not have large invalid volume as far as possible, the width of the metal spring piece