Bronchial wall thickening on CT is a descriptor of an imaging test that is usually due to infectious or non-infectious factors and requires prompt medical attention upon detection. If bronchial wall thickening is detected on chest CT, it is usually associated with chronic non-specific inflammation of the trachea, bronchial mucosa and surrounding tissues caused by infectious or non-infectious factors. For example, chronic bronchitis is characterized by bronchial glandular hyperplasia and increased mucus secretion, which in turn leads to bronchial wall thickening. Among them, chronic bronchitis is mainly due to long-term exposure to dust, chemical substances, bacterial or viral infections, the disease patients bronchial mucosa can occur congestion and swelling, which in turn leads to bronchial wall thickening. There are many causes of bronchial wall thickening, if there are obvious respiratory symptoms such as coughing, coughing up sputum, chest pain, etc., it is recommended to seek medical treatment in a timely manner to improve the relevant laboratory tests, a clear diagnosis of the standardized treatment in accordance with the doctor’s instructions.