ABSTRACT
[Objective] To discuss application of Protection Wei Qi in the six channels transmission change. [Methods] Study and summarize application of Protection Wei Qi in the six channels transmission change through methods of literature research and comprehensive analysis. [Results] The strength of Wei Qi in the book mostly is a key factor in the development of outcomes in the Six channels Disease.He always takes Protection Wei Qi as a fundamental criterion in the Six channels Disease treatment. Disease in Sanyang, Protect the Wei Qi by Quxie;Disease into Sanyin, Protect the Wei Qi by Fuzheng. [Conclusion] Zhang Zhongjing had great importance to the role of the Wei Qi in clinic. And he ran through Shang Han Lun always by treatment ideas of Protection Wei Qi. The performance of Protection Wei Qi though was particularly prominent in the six channels transmission change.