This article summarizes SHENG lixian’ s experience in preventing and treating recurrent respiratory tract infection in children. Repeated respiratory tract infections in children are always due to lack of healthy Qi

insecurity of exterior Wei Qi

repeated external contraction

struggle between healthy Qi and pathogenic Qi and disharmony between Ying Qi and Wei Qi. Congenital deficiency and physical weakness are the internal causes of the disease;improper feeding

inadequate care and little contact with wind and sun are external causes. In clinical practice

the disease can be treated upon different stages including acute

postponing and recovery stages. The common methods are reinforcing healthy Qi（ boosting Qi and fortifying the spleen

harmonizing Ying Qi and Wei Qi

nourishing Yin and promoting fluid production） and dispelling pathogenic Qi（ dispersing wind and dissolving phlegm

removing stagnation and dissolving stasis）.