The 19-year-old told the club's website: "I got a call saying to come back, that I'd been recalled. I'm delighted to be back.
"It was good [at Sheffield United], the staff and the players there really helped me. I learned a lot and it was good to be playing and starting some games.
"I want to try and get some games under my belt, score some goals and help put us in the best position possible."
Poleon has also had a loan spell at Bury this season.