Various allergenic pollens floating in the air are an important group of allergens that cause allergic asthma. Currently, there are hundreds of plant pollens known to cause human sensitization. Pollen-induced allergic diseases include seasonal allergic rhinitis, allergic conjunctivitis, allergic dermatosis and allergic asthma. The pathogenesis of a series of allergic reactions caused by pollen, including allergic asthma, is mainly related to type I allergic reactions. It is an allergic disease that allergists have studied more and more effectively. Since allergic asthma induced by pollen is a common disease in clinical practice, many doctors have proposed the diagnostic name of pollen allergic asthma in recent years.