The tie will take place at Culver Road, Lancing on Wednesday 26th April at 7:30pm.
The U’s are currently 9th in the Isthmian League South East Division and beat league rivals Horsham in convincing fashion in their Quarter-Final contest, coming out 4-1 winners.
While the Reds scored six second-half goals, including a hattrick from Ibby Akanbi to get past Crowborough Athletic in the previous round.