The Leganés & Denmark striker will move to the Camp Nou as a replacement in the short term for injured Luis Suárez.
It's believed that Quique Setien found Braithwaite appealing because of his ability to play upfront and out wide, and that versatility will help to plug the gap while Suárez is out.
Numerous Catalan publications are carrying the story and well-connected Italian journalist Fabrizio Romano has confirmed that the deal is almost done.
Barça takes on Eibar this coming weekend and then face a trip to Naples to face Napoli in the Champions League round of 16 first leg next week.
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