Abstract： This paper summarizes and introduces the health preservation thought of national traditional Chinese medicine master PI Chiheng in preventing and treating chronic nephritis. As a kidney disease with a prolonged course and easy recurrence，daily care plays an important role in the comprehensive treatment of chronic nephritis. Professor PI Chiheng holds that the core pathogenesis of chronic nephritis is deficiency，dampness，stasis，and toxin. He attaches great importance to "combination of medical treatment and health preservation" in treatment. Therefore， based on the "kidney-life theory" and the health preservation concept of "strengthening the root and cultivating the orginial qi，and regulating the five zang-organs simultaneously"， he constructs a health preservation system for chronic nephritis covering essence-qi-spirit. This system provides clinical guidance for the health management of patients with chronic nephritis from the dimensions of emotional regulation， diet management， daily life adjustment， and Daoyin（ traditional Chinese mind-body exercise） for health preservation.