〔Abstract〕 To explore the principle of using buccal mucosa bloodletting therapy to treat peripheral facial palsy, and to explore and study the traditional Chinese medicine principle of peripheral facial palsy, the special location of buccal mucosa and the historical evolution and mechanism of bloodletting therapy. By sorting out the association between buccal mucosa and peripheral facial palsy, the effect of buccal mucosal bloodletting therapy on peripheral facial palsy was studied, so as to better promote the development and research of bloodletting therapy, provide exploration and discovery under theoretical guidance for the treatment of peripheral facial palsy, and provide new clinical treatment ideas and methods.