Emphysema is mostly caused by bronchial asthma and chronic obstructive pulmonary disease, with clinical manifestations of heart tiredness and shortness of breath after activity, imaging suggesting enhanced translucency of both lungs, and pulmonary function tests suggesting decreased lung function. Emphysema in Chinese medicine is mostly manifested as qi deficiency in the lungs, spleen and kidneys, and rock candy is a cold product, so eating rock candy for emphysema cannot be used alone, but should be steamed together with pears and Chuanbei mother, and given to patients for a long time, which can play the role of tonifying lungs and nourishing qi, moistening lungs and resolving phlegm. Taking rock candy for emphysema is likely to lead to the dereliction of the transport and transformation of the spleen and stomach, because the coolness of rock candy tends to injure the yang energy of the spleen and stomach, which is not in line with the pathogenesis of emphysema in which the lung, spleen and kidney are deficient in qi. Therefore, taking rock candy alone is not recommended. If combined with Chinese herbs, especially those for tonifying the lung and resolving phlegm, it can be used in the treatment of emphysema, which can delay the aggravation of emphysema and improve lung function.