Chronic bronchitis is a chronic non-specific inflammation of the trachea, bronchial mucosa and surrounding tissues due to infectious or non-infectious factors. It is characterized clinically by symptoms such as cough, sputum, shortness of breath and a chronic process of recurrent episodes. It is a common and frequent disease in the elderly. It belongs to the scope of cough, asthma and phlegm in ancestral medicine. Main symptoms Cough, shortness of breath, coughing sputum, with a long course and repeated acute attacks with aggravation. It mostly develops in winter and spring, and the cough worsens during the attacks. The sputum volume increases, the wheezing is restless, and some patients cannot even lie down. The cough and sputum are especially obvious in the morning after waking up, and the amount of sputum is also more in the early morning. In the case of wheezing chronic bronchitis, there is often a croupy sound during the attack, and breathing is often difficult. The reason for this is that the patient with chronic bronchitis is a result of the long-term interaction of various factors such as diet, smoking and alcohol consumption, and environmental pollution, which gradually causes weakness of the lungs and spleen, and then the invasion of external evil, which triggers the disease. The lung is the main gas, the division of breathing, the outer hair; lung gas is weak, the external guard is empty, which is conducive to the six foreign evil to take advantage of the weakness of the entry, the evil guest in the lung, so that the lung gas is not normal publicity, so the cough, asthma symptoms. The spleen is the master of transportation and transformation, and when the spleen is deficient, the transportation and transformation is out of order, so not only is the essence of dietary grains less available, but water and moisture also accumulate and become phlegm and drink, and the phlegm and drink are rebellious and obstruct the airway, so there is a lot of asthma and phlegm. The kidney is the master of Qi, the master of water and the master of vital fire, and if the kidney is deficient, the Qi does not return to the root, so the movement is shortness of breath; if the vital fire is insufficient, the water loses its control and becomes phlegm. According to the patient’s condition, we should pay attention to distinguish the symptoms and the root cause, and distinguish the long-standing disease from the new disease. According to the TCM theory of “treating the symptoms when it is urgent, and treating the root when it is slow”, the treatment of acute attack is mainly based on treating the symptoms, or with western medicine such as anti-inflammatory, antispasmodic, cough and expectorant treatment; while the treatment of remission is mainly based on fixing the root, mostly with TCM to fix the root, mainly by tonifying the three organs of lung, spleen and kidney.