The 2017–18 Big 12 men's basketball season began with practices in October 2017, followed by the start of the 2017–18 NCAA Division I men's basketball season in November.

Regular season conference play started on December 29, 2017 and concluded on March 3, 2018.

Kansas won the regular season conference title, their NCAA record 14th consecutive year winning the regular season title.

[2] On March 18, 2017, head coach Brad Underwood left Oklahoma State to accept the head coaching position at Illinois after one year at OSU.

This is a list of the power conference teams (ACC, Big 10, Pac-12 and SEC) the Big 12 plays in the non-conference (Rankings from the AP Poll): To earn "consensus" status, a player must win honors from a majority of the following teams: the Associated Press, the USBWA, Sporting News, and the National Association of Basketball Coaches.