Rigid-Gental Differentiation of Psychosomatic Medicine is a theory which describes the process of occurrence,development and the changes of illness.It believes that the nature of illness belongs to flexibility and rigidity unable to supplement each other,causing abnormal flow of qi,qi stagnation,blood stasis,obstruction of phlegm,retention of dampness,fire due to adverse flow of qi,impairment of yin due to fire,and disorder in ascension and descension.According to the theory,there are 2 classes,4 items,16 families in differentiation of syndromes.2 classes are:Rigid Symptom,Gental symptom.4 items are:Rigid-excess Symptom, Gental-excess symptom, Rigid-deficiency Symptom,Gental-deficiency symptom.2 classes,4 items and 16 classes are qualitative and quantative methods to research pychosomatic disease.When a patient comes,first he/she will be judged to Rigid symptom or Gental symptom by their syndromes,and then will be decided to the level of how rigid or gental he/she is.In the end,the doctor will treat the patient by chinese medicine.