Asthma when pregnant should first be treated with medication under a doctor’s supervision; if the condition is not relieved or continues to worsen, the patient should seek medical attention as soon as possible. When pregnant if asthma suddenly offends first should be under the guidance of a doctor to use medication, the drug according to the patient’s usual medication, symptoms and risk factor levels are adjusted, if the condition is not relieved or continue to aggravate, it is recommended that pregnant women as soon as possible to consult a doctor, follow the doctor’s instructions for treatment; second, usually need to stay away from allergens; finally, should keep the surrounding air clear. Uncontrolled asthma during pregnancy has serious adverse effects on the pregnant woman and the fetus, and active control of asthma can reduce the risk of mother and child; asthma treatment principles during pregnancy are the same as those for typical asthma, and based on pregnancy safety considerations, drug selection should be careful and weigh the pros and cons; pregnant women with asthma should be guided by specialists, and reasonably select safer therapeutic drugs, and downgrading of therapy should not be considered before delivery. During pregnancy, pregnant women should stay away from allergens, pay attention to rest, maintain a good work and rest schedule, avoid cold, spicy stimulating, allergenic food, avoid smoking and alcohol, and avoid strenuous exercise to prevent the occurrence of asthma.