Treatment before symptoms arising,is a method of treating disease based on the law of disease development with the thought of differentiating diseases. It has important theoretical and clinical value and can not be ignored in modern Chinese medicine. Starting from the historical source of treatment before symptoms arising,this paper sums up its course of emergence,evolution and development. Combining with the examples of modern application,the author holds that the strategy of treatment before symptoms arising contains the thought of holistic view of disease and treatment based on differentiation of disease,which has important guiding significance for the clinical practice of traditional Chinese medicine.