RESUMEN
To study and analyze the reinforcing-reducing manipulations of acupuncture in Internal Classic. The major methods of reinforcing-reducing manipulations of acupuncture in Internal Classic were reinforcing-reducing by manipulating the needle in cooperation with the patient's respiration, reinforcing-reducing effect induced by slow and quick manipulation of needle, and open-close reinforcing-reducing manipulation, these three methods were usually applied in combination. All of reinforcing-reducing manipulations should be based on the principle of puncturing along and against the flowing direction of the meridian qi. Mastering the reinforcing-reducing manipulations of acupuncture in Internal Classic will contribute to the improvement of therapeutic effects in clinical practice.