Objective]To summarize the treatment of Professor Lin Huiguang in treating chronic atrophic gastritis(CAG).[Method]The author studies from the teacher, collecting related medical records, analysing etiology and pathogenesis of Professor Lin Huiguang in chronic atrophic gastritis, and sums up dialectical and treatment of chronic atrophic gastritis and exemplify that. [Results]Professor Lin Huiguang thinks that the occurring of chronic atrophic gastritis because of diet, emotion, exogenous evil and so on. It causes the stomach out of harmony, dysfunction of the spleen, and qi stagnation and blood stasis, the spleen and stomach qi deficiency type, dysfunction of the spleen type, liver-spleen disharmony type, cold and heat type, stomach yin deficiency type of chronic atrophic gastritis have been put forward, and the relevant treatment also is proposed.[Conclusion]Professor Lin Huiguang has rich clinical experience and unique insights on the treatment of chronic atrophic gastritis in traditional Chinese medicine. Curative effect is distinct and it is worth learning and promoting.