The present application relates to the technical field of medical devices, in particular to a
lung function recovery auxiliary device, comprising a chest band for limiting the thoracic cage of a patient and a
mask for controlling the
breathing of the patient, the chest band comprising a band body and a first strip-shaped air bag arranged on the inner wall of the band body in an inflated state, the
mask comprising a
mask body for sealing the face of the patient at the mouth and
nose, a partition plate being arranged in the mask body to divide the inner cavity of the mask body into a mouth cavity and a
nose cavity which are independent of each other, a mouth valve and a
nose valve being arranged on the mask body respectively, and a mouth valve
control unit and a nose valve
control unit being arranged on the mask body respectively to control the opening and closing of the mouth valve and the nose valve, the first strip-shaped air bag being communicated with the mouth valve
control unit and the nose valve control unit through air pipes one and two respectively. The present application can assist the patient to perform abdominal
breathing or pursed-lip
breathing by adjusting the tension state of the chest band.