Braves president John Schuerholz says the July 17 honors are the organization's way of thanking Maddux for the immeasurable contributions he's made to the team.
Maddux's No. 31 will be the sixth Braves number to be retired.
The recent retiree spent 11 seasons with the Braves beginning in 1993 and was a member of the 1995 world championship team. He is the first pitcher to win the NL Cy Young in four consecutive seasons.
Maddux's career 355 wins rank him eighth on Major League Baseball's all-time list. He won a Gold Glove a record 18 times, most recently in 2008.