BNBU Student Union is an organization representing all full-time students. In the spirit of democratic autonomy, it promotes the moral, intellectual, physical, and group education to students, encourages students to care about society, understand the world, seek student welfare, strive for students' rights, and work with all BNBU staff to promote the development and improve the reputation of the college.

Student Union is the general term for all student organizations at BNBU. The structure of BNBU Student Union mainly includes the Executive Committee of Student Union (Exco. of SU) and the Representative Committee of Student Union (Repc. of SU). Exco. of SU is the main body for carrying out all student activities and promoting student development. The Repc. of SU is composed of representatives from academic societies, executive committee of dormitories, and interest clubs. Repc. of SU is mainly responsible for drafting the overall rules of the Student Union and supervising the implementation of student organizations and activities.

The term for both the Executive Committee and the Representative Committee of Student Union is one academic year.