Thus 6 functions of stream buffer zone are introduced to explain their significance to regional ecological environment, and 3 fundamental principles for scientific management of stream buffer zone are put forward. 文章详细介绍了河溪缓冲带的6种功能,以说明河溪缓冲带对流域生态环境的重要性,提出了3条缓冲带科学管理的基本原则。