Bronchial asthma is a common respiratory disease, and there are about 20 million people with asthma in China. About half of them start before the age of 12, and the elderly are also susceptible to the disease. Many patients have the disease for decades. Many patients with chronic cough, unexplained episodes of chest tightness, etc. should be screened for asthma and early diagnosis is essential. Asthma is a chronic disease and requires regular follow-up with a respiratory physician to guide treatment. Self-management in the home is a major part of treatment. The following is a brief description of the commonly used drugs. Glucocorticoids are the most effective anti-inflammatory drugs. Beclomethasone propionate, fluticasone and butaned are commonly used. It is used for the prevention of asthma attack. It should be used in combination with β2 agonists or theophylline during acute asthma attacks. Long-term inhalation therapy is required for mild-moderate to moderate cases. The safe dose is 200ug-400ug, older children can be used for a short time up to 600ug-800ug per day. Oral medication: Children with severe acute exacerbations should be given oral glucocorticoids early to prevent deterioration, so that glucocorticoids with a short half-life, such as prednisone 1-7 days, 1-2mg/kg, usually no more than 30mg/d, divided into 2-3 oral doses. Intravenous medication: Hydrocortisone succinate or hydrocortisone should be given promptly and early in severe asthma attacks by intravenous administration of 5-10 mg/kg each time, or methylhydrogenated prednisone at 1-2 mg/kg 2-3 times daily. Very severe cases require higher doses of glucocorticoids for a short period of time (3-5 days). 2.Leukotriene receptor antagonist is a new generation of non-glucocorticoid drugs suitable for long-term prophylaxis of asthma in children over 12 years old. It is not suitable for the antispasmodic treatment of asthma attacks. 3.β2 agonists Short-acting such as salbutamol, terbutaline, 5-10 minutes super-effective, maintain 4-6 hours, mostly used for the treatment of acute asthma attacks and prevention of exercise asthma. If the number and dose of use need to be increased to control the condition, suggesting an exacerbation of asthma, excessive or blind increase is contraindicated at this time. Overdose can cause life-threatening cardiac arrhythmias and sudden death. Long-acting such as salmeterol and formoterol, lasting 8-12 hours, are indicated to control night and early morning asthma attacks and exacerbations. Oral administration: short-acting in 15-30 minutes onset of action, extended-release and controlled-release formulations with long duration of efficacy, used to prevent and control recurrent asthma attacks and nocturnal asthma. 4.Mast cell membrane stabilizer Sodium cromoglycate for inhalation is used to prevent asthma attacks, also can prevent acute airway constriction and seasonal asthma attacks caused by exercise, cold air, etc. 5.Theophylline Oral medication: controlled-release type is suitable for nighttime asthma attacks. When combined with oral β2 agonist, it is easy to induce arrhythmia, so the dose should be reduced if you want to combine it. Synergistic effect with glucocorticoids and anticholinergics. For acute asthma attacks, add 3-5mg/kg of aminophylline to 30ml of 5% glucose solution for the first dose within 24 hours and administer intravenously within 20-30 minutes. In severe cases, follow with 0.6-0.9mg/(kg.h) maintenance, if not maintenance dosing, the original dose can be repeated every 6 hours. For <2 years old, or if theophylline has been used within 6 hours, the first dose should be reduced by half. The drug has a narrow therapeutic window and blood levels should be tested.