The invention discloses an airway opening device for gynecological uterine cavity surgery operation. The airway opening device comprises a base, a two-way air pump, a I stepping motor, a driving gear,a rack plate, a seat plate, a II stepping motor, a rotating shaft, a backrest, a lifting rod, a headrest, a restraining strap, an adjusting sleeve, a raising air cushion, a connecting air tube, a fixing sleeve, a rotating sleeve, a telescopic rod and a lower limb supporting plate. Firstly, through a neck inflatable opening mechanism, head area and neck area of a patient who is subjected to painless induced abortion, painless intrauterine device removal, painless curettage and the like are leaned back by a medical staff conveniently, a good airway opening effect is achieved, the blood oxygen saturation of the patient is improved, and the safety and comfort of the patient are ensured; secondly, through the sliding adjustment design, the medical staff can adjust the adaptability convenientlyaccording to the height of the patient; and finally, the effective raising restraint on lower limbs of the patient can be achieved, and a lower body surgery area of the patient is well exposed. In summary, according to the airway opening device, the operation of an existing gynecological uterine cavity surgery is realized, good popularization and application value is achieved.