Accompanied by the Welsh Government Deputy Minister for Agriculture, Dacian Ciolos will see for himself the unique Welsh farming landscape and hear of the issues and concerns in the country.
Deputy Minister Alun Davies, said:
"I am proud to welcome the Commissioner to Wales today, and especially pleased he can enjoy one of the highlights of our rural calendar here.
"I sincerely hope Commissioner Ciolos makes the most of the top quality Welsh food on offer, and I look forward to direct discussions with him on the reform of the Common Agricultural Policy.
"This is a good opportunity to stand up for Welsh farmers and to further progress favourable reform. I am resolute in strong leadership in changing times in Wales, and remain confident and committed to securing the best possible deal for Welsh farming in all areas of reform."
The European Commissioner Dacian Ciolos, said:
"I am delighted to be attending the Royal Welsh Show this year and it will be a pleasure to officially open the event.
"I look forward to my discussions with the Welsh Government and farmer representatives, and hearing broader Welsh views, as we continue our negotiations on the reform of the CAP after 2013."