The Pumas travelled to Uruguay to play Los Teros and beat them 79-5.
All Blacks play Fiji, Wallabies play Georgia, Springboks play Portugal and Pumas play Uruguay.
Three-time World Rugby U20 Championship winners France will advance to the final after beating New Zealand 55-31 in an enthralling and high-scoring encounter.
A week after being beaten by a very new look French team Los Pumas tuned their fortunes around with a 33-25 victory.