They defeated Eire Óg Annacarthy 0-15 to 0-8 in New Inn last night.
A tight first half saw Eire Óg lead 0-5 to 0-4 at the break but a strong second half under lights saw them through.
They now progress to meet Clonmel Commercials in Leahy Park in Cashel next Sunday afternoon.
After the game Aherlow manager Derry Peters said he was pleased with his side’s performance
Elsewhere Thurles Sarsfields progressed to the County Intermediate hurling semi final after they defeated a gallant St Mary's Clonmel 1-15 to 0-16 after a close game in Clonoulty.
The teams were tied 1-8 to 0-11 at the break but Sarsfields edged ahead in the second half and will now play Ballinahinch in the county semi final.