The teenage striker has not featured for Palace since Holloway took charge at Selhurst Park but is hoping first-team action for the Bees can improve his prospects with the Championship club.
De Silva must first help move Edgar Davids' side away from the relegation places, a challenge he is relishing.
He told the club's official website: "It is very hard to break in and make an impression when the team are flying. Hopefully I can do that whilst on loan.
"It will be great to get some first-team action and I am really looking forward to making an impact at Barnet.
"The team have picked up some good results lately so hopefully I can help keep that up. I am very grateful I have been given the opportunity to come here."