[Smithy]

A drag queen from RuPaul's TV show got busted this weekend for allegedly pummeling her boyfriend -- who identifies as a man -- in what sounds like a bloody ordeal.

According to the probable cause affidavit, obtained by TMZ, Von'Du came home early Friday morning in what her boyfriend described to cops as an intoxicated state ... and was apparently upset when she found her BF sleeping there, even though the boyfriend says he'd notified her he was gonna crash.

The BF went on to tell police that what happened next was nothing short of a vicious beatdown -- claiming Von'Du proceeded to punch his face 4 to 5 times, strangle him, drag him across the floor and eventually push him into a bed frame ... which the BF says knocked him unconscious after he hit his head, making him bleed profusely.

Eventually, Von'Du's boyfriend said he was able to escape, found help and was hospitalized ... where the report notes he needed 14 stitches in his face and head. The cops say they saw the BF's injuries and, after a preliminary investigation, found probable cause to get an arrest warrant for Von'Du.