The outspoken talk show host and former X Factor judge said the sight of the 18-month-old in animal fur made her want to by 'physically sick'.
The 62-year-old told Closer Magazine: "I know PETA has asked the Kardashians to stop. (North) isn't an accessory - she shouldn't be wearing ugly couture clothes.
"(Fur) makes me physically sick, and wearing it is a very dated way of showing everyone how rich you are. Our grandparents did it, but now we've been educated, it's cruel to keep the trade going."
Sharon also attacked the Kardashian family for only being famous because of their looks, and nothing more.
She went on: "We're in the limelight as Ozzy is an international star, but their fame is built purely on beauty.
"Who do you know who has five stunning daughters? Every family has at least one dud!"
Sharon is a staunch supporter of People for the Ethical Treatment of Animals and Kim is no stranger to run-ins with PETA.
PETA Senior Vice President Lisa Lange said: "Kids are naturally drawn to animals and sympathetic to their plight.
"And there's no reason to think that North is any different. If the fur coat that she's been dressed in is real, animals have suffered for vanity, something that we're sure neither North nor any little girl her age would support."
Peta President Ingrid Newkirk, added: "When God gave Kim a big bottom, he had to take something from the top."
But fur isn't the only controversial attire Kim and dad Kanye dress their toddler in. Last month, for example, Kim posted a photo of North wearing a bullet proof vest!