NHL legend Ed Belfour pled guilty to being a drunken mess during last month's incident at a Kentucky hotel ... but the ex-goalie got nothing more than a slap on the wrist as punishment.

As we previously reported, 54-year-old Belfour found himself in a world of trouble after hotel employees in Bowling Green, Ky. accused him of a being belligerent drunk on Jan. 28.

You can see in video we obtained of the incident ... when officers arrived on the scene, Belfour was clutching a curtain rod on the floor and kicking a spa door.