Abstract: Among various treatment methods recorded in The Yellow Emperor's Inner Classic， the filiform-needle therapy was expounded especially clearly. In The Yellow Emperor's Inner Classic， the prerequisite to filiform-needle therapy， as well as its manipulation and ultimate goal were summarized. Besides， its reinforcing mechanism， reducing mechanism and taboo， along with other contents related to filiform-needle therapy were also mentioned in the book. The Yellow Emperor's Inner Classic set up a basic system of filiform-needle therapy in acupuncture and moxibustion subject. What's more， it has become the standard of acupuncture manipulation， which has played an important role in the forming process of ancient acupuncture subject.