Respiratory dysfunction can be affected by both hypoxia and carbon dioxide retention. Dyspnea and increased respiratory rate are often the first clinically important symptoms to appear. It manifests as labored breathing, accompanied by accelerated respiratory rate, superficial breathing, nasal flapping, and participation of auxiliary muscles in respiratory activity, especially in COPD patients with airway obstruction and respiratory pump failure factors. Sometimes there can also be respiratory rhythm disorders, manifested as tidal breathing, sigh-like breathing, etc., mainly seen when the respiratory center is inhibited. Respiratory failure does not necessarily have dyspnea, and respiratory depression also occurs in severe cases. Preventive measures are as follows: 1. Exercise consistently to enhance physical fitness and cold resistance; 2. Increase the temperature in the living room appropriately; 3. 4.Prevent heat in the abnormal dry heat, measures to reduce the temperature of the work and living environment, improve humidity, for preventing chronic obstructive pulmonary disease occurrence of respiratory failure is beneficial; 5.Avoid sweating, to prevent a lot of water loss, blood viscosity rise, blood flow slow stagnation, pulmonary tissue blood circulation disorders; 6.Avoid excessive sputum towers, difficult to cough up, hinder alveolar ventilation. 7.When using respiratory central stimulants for patients with chronic respiratory failure, attention should be paid to keep the airway open, and if necessary, increase the oxygen concentration, because the use of respiratory central stimulants increases the oxygen consumption of the body.