Abstract: The number of patients with mild elderly dementia continues to rise worldwide. Bibliotherapy has emerged as a potential intervention to alleviate mild elderly dementia. This paper explores the theoretical foundations of bibliotherapy and clarifies its guiding principles in the intervention of mild elderly dementia. Combining with the practical applications, it proposes specific intervention methods and pathways for applying bibliotherapy to elderly patients with mild dementia, providing reference and guidance for implementing bibliotherapy intervention in this field.