One of the Hunter Valley's biggest rural properties has been sold to Chinese buyers in a deal reportedly worth $45 million.

Glenrock Station, near Scone, is a massive grazing property for cattle breeding and other pursuits.

The deal will now be assessed by the Foreign Investment Review Board.

It is in the electorate of the Federal Opposition's agriculture spokesman, Hunter MP Joel Fitzgibbon.

He said foreign investment should be welcomed.

"We do need foreign to reach our full potential in agriculture," he said.

"We need to be discerning, we need to be transparent, but ensure they are always in the national interest.

"We will wait and see what the outcome is, but I think we do need to be inviting of foreign investments."

Mr Fitzgibbon said people should not discriminate against Chinese buyers.

"People seem more concerned about foreign investment from Asia than they are if it's coming from the United States or the UK," he said.

"I find that confusing - we desperately need foreign investment.

"We need a system so that all Australians know who is buying what and for how much."