通过对桂枝汤类方的分析 ,笔者发现虽然药味变化较少 ,大多表现在药量的演变。但是 ,在药物组成较少的情况下 ,因为用量的改变和较少的药味变化 ,而使得整个方剂结构以及治证的变化呈现一定的规律性。尤其以药对的量比变化更为突出。桂枝汤中最能体现其调和营卫 (阴阳 )、生化 Through the analysis of the Guizhi Tang class, the author found that although the changes in drug taste are less, most of them are manifested in the evolution of drug dosage. However, in the case of less drug composition, because of the change in the dosage and the less change in drug taste, the changes in the structure of the whole prescription and the treatment of the card show a certain regularity. In particular, the change in the ratio of drug pairs is more prominent. The Guizhi soup best reflects its harmony with health (Yin and Yang) and biochemistry.