Restrictive ventilatory dysfunction mostly refers to alveolar hypoventilation caused by restricted alveolar expansion during inspiration, simply put, restricted lung expansion causes pulmonary hypoventilation. In this case, pulmonary function tests mostly show a decrease in lung volume indicators such as spirometry, while FEV1% and FEV1/FVC flow rate indicators have little effect. Restrictive lung disease can be manifested as restrictive ventilation dysfunction, mainly seen in interstitial lung diseases, such as interstitial fibrosis and pulmonary edema, but also in thoracic diseases such as pleural hypertrophy, pneumothorax, and pleural effusion. Thoracic diseases such as spinal deformities, neuromuscular disorders, and trauma, etc. Because restrictive pulmonary ventilation dysfunction is mostly caused by diseases that obviously require urgent treatment, when restrictive ventilation dysfunction is detected by pulmonary function tests, it is necessary to clarify the cause as much as possible and actively treat the original disease.