Existing literatures have explained the TCM mechanism of point LI11(Qu chi) in reducing blood pressure as follows: point LI11(Qu chi) is the he-sea point of the Yangming Large Intestine Meridian of Hand, which is the most abundant part of qi and blood, while Yangming meridian is rich in qi and blood, and " he-sea points treating reversed flow of qi and diarrhea" . Therefore, acupuncture can absorb Yangming qi and blood, and then play a role in reducing blood pressure through suppressing hyperactive liver and descending adverse fire. This paper raises doubts about the two core points involved in the interpretation of the above mechanism: Firstly, " Yangming" refers specifically to the Yangming Stomach Meridian of Foot, not the Yangming Large Intestine Meridian of Hand; Secondly, " he-sea points treating reversed flow of qi and diarrhea" does not mean that all he-sea points can treat " reversed flow of qi and diarrhea" , and there are still disputes in the field of traditional Chinese medicine about the clinical syndrome treated by he-sea points. In addition, the article also discussed the possible hypotensive mechanism of point LI11(Qu chi) combined with the main pathological factors of hypertension, the acupoint nature of point LI11(Qu chi) and the main clinical syndrome.