The TCM classification of cough is based on the following points: First, cough with external sensation. The first point is external cough, which includes the following points: 1) wind-cold attacking the lung, which should be treated with Sanjiao Tang and Stop Loudspeaking; 2) wind-heat attacking the lung, which should be treated with Sang Ju Drink; 3) wind-dry injury to the lung, which should be treated with Sang Xing Tang. The second point is internal injury cough. For cough with internal injuries, it can be divided into the following points: 1. for phlegm-dampness in the lung, apply Er Chen Tang and San Zi Nourishing Relatives Tang; 2. for phlegm-heat in the lung, apply Qing Jin Hua Phlegm Tang; 3. for liver-fire in the lung, apply Baicalin Di Bai Tang; 4. for lung-yin deficiency, apply Sha Shen Mai Dong Tang, etc. Clinically, for cough, it is necessary to carry out reasonable identification and rational use of medicine under the guidance of a doctor.