The 26-year-old is a key figure is Eddie Jones' England set up and feels it is crucial that they build on the solid platform already in place.
England claimed an impressive series win in Argentina in June and they will meet with the Pumas again for their November international.
Launchbury insists England must come up with a new game plan for the tie at Twickenham or risk coming away on the wrong end of the result.
"It is really exciting to play Argentina again and it makes it a battle of the game plan," Launchbury said.
"Having played them twice in short succession, it's important now to come up with something slightly different."