UFC Light Heavyweight champ Jon "Bones" Jones was arrested early this morning for DUI after he totaled his Bentley in upstate New York ... TMZ has learned. 

Law enforcement sources tell TMZ ... Jones was involved in an accident at around 5:00 AM in Binghamton, NY. We're told the car -- which Jones crashed into a pole -- was totaled and cops arrested Jones on the scene for DUI. 

According to our sources, Jones was taken into custody by Broome County Sheriff and bailed out a few hours later ... by his mom. Jones is from nearby Ithaca. 

Jones last fought on April 21, defeating Rashad Evans by unanimous decision. His next scheduled fight is on September 1 in Las Vegas against Dan Henderson.