The difference between acute bronchitis and bronchopneumonia lies in the following: etiology and pathogenesis, site of involvement, symptoms and so on. 1, different causes: acute bronchitis is often caused by viral infections, various physical and chemical factors such as irritating gases and inhalation of allergens, while bronchopneumonia is caused by a variety of pathogens, of which bacterial infections account for the majority. 2, the involvement of different parts: acute bronchitis inflammation in the bronchial tubes, while bronchopneumonia inflammation occurs mostly in the alveoli, and often secondary to other diseases. 3, the symptoms are different: acute bronchitis is generally more acute, the pharyngeal symptoms are more serious, the main clinical manifestations of cough, cough sputum, while bronchopneumonia is generally manifested as a high fever, cough, cough sputum, some patients will have chest pain, when the condition is more serious, there will be respiratory distress and other symptoms.