Bronchial asthma diagnostic criteria include the following: 1, recurrent symptoms of dyspnea, chest tightness, wheezing and shortness of breath, and are mostly related to exposure to allergens, upper airway infections, and physical and chemical factors or exercise; 2, extensive croup in both lungs, predominantly in the expiratory phase, or prolonged expiratory phase; 3, clinical symptoms can be relieved by themselves or after drug treatment; 4, except for chest tightness caused by other diseases The symptoms of chest tightness, wheezing and shortness of breath caused by other diseases are excluded; 5. If the symptoms are not typical, bronchial excitation test and diastolic test can be performed. The diagnosis can be clarified by meeting 1-4, or 4-5.