Schmidt had shown "continued unsporting behaviour" in Leverkusen's 1-0 defeat to Borussia Dortmund on Sunday, adding another two matches on suspension to his three-match ban, it said.
He is also banned from the changing rooms and any area used by players during matches, the DFB said in a statement.
Schmidt was sent to the stands for dissent by referee Felix Zwayer after Dortmund had taken the lead but the coach refused to leave despite repeated efforts.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
He wanted to be told of the reasons for his dismissal, refusing to go even after Leverkusen captain Stefan Kiessling told him to, pacing down the sideline and shouting "why, why?".
It was only after Zwayer interrupted the game for nine minutes, sending the teams into the changing rooms, that Schmidt left his coaching zone and walked up to the stands, allowing for the game to resume.
Schmidt, who has since apologised for his behaviour, has accepted the verdict, the DFB said.
(Reporting by Karolos Grohmann; Editing by Angus MacSwan)
