Respirator and method for assisting patient to breath

The invention discloses a respirator and a method for assisting a patient to breath, and belongs to the technical field of medical instruments. The respirator comprises a chest auxiliary breathing device for assisting the breathing of a patient by applying different pressures to different chest wall acting points of the patient, wherein the chest auxiliary breathing device comprises a plurality offirst suction presses and a film contacted with the patient; each first suction press comprises a support frame, a suction shaft partially sleeved with the support frame, a driving mechanism used fordriving the suction shaft to move linearly in the axial direction, and a controller used for controlling the motion amplitude of the suction shaft; a first sucker is arranged at one end of the suction shaft, extending out of the support frame; the first sucker is contacted with the chest of the patient through the film; and the driving mechanism is electrically connected with the controller. Therespirator is applied to th