He will be presented with the award between two halves of a special 80th-birthday concert he is conducting with the BBC Symphony Orchestra. The concert program features works by Debussy, Ravel, and Boulez himself.
The presentation will be featured on a live Radio 3 and BBC 4 television broadcast.
Composer Harrison Birtwistle will present Boulez with a special statuette, and Peter Maxell Davies, who holds the title of master of the Queen's music, will introduce the ceremony.
David Ferguson, chair of the academy, said, "Beyond his distinction as a composer, Pierre Boulez has made his mark as a performer, a teacher, a researcher, and a writer. He has multiple claims on being one of today's most important musical figures."
The British Academy of Composers & Conductors provides workshops, legal advice, collaboration opportunities, and other services to its members. Previous recipients of the fellowship include Davies, along with John Adams, David Arnold, Malcolm Arnold, John Barry, John Dankworth, Elton John, and Paul McCartney.