Pictures courtesy of Pete Seymour of Barnet FC
The Bees are now out of all three cup competitions and will divert their attention to climbing up the league table when hosting Torquay United in a League Two clash at Underhill on Tuesday evening.
The Bees failed to impose themselves on the game and Oxford were worthy winners of the tie.
Barnet succumbed to a 2-0 home defeat in the FA Cup First Round against fellow League Two side Oxford United.