The loan runs until 30 June 2018 and Cracovia have an option to make the deal permanent prior to 30 May 2018.BCFC
The loan runs until 30 June, 2018 and Cracovia have an option to make the deal permanent prior to 30 May, 2018.
Cracovia, who are based in the Polish city of Krakow, play in Poland's top division, the Ekstraklasa.
They are currently 12th in the 16-team division with 22 points from their 21 games.
Since joining Blues from Danish side Randers in August 2015, Brock-Madsen has figured just eight times for the First Team and yet to get off the goalscoring mark.
His last appearance came in a Championship home game against Huddersfield Town in December 2015.
The 25-year-old Dane spent much of last season on loan at Dutch Eredivisie side PEC Zwolle, where he scored seven times in 23 appearances.
This season has seen Brock-Madsen play five times for Blues Under-23s in league and cup and score twice.