The All Blacks pummelled the Pumas in a one-sided game at a fairly quiet Stade de France on Friday through tries by Will Jordan (3), Jordie Barrett, Shannon Frizell (2) and Aaron Smith to set up a showdown with defending champions South Africa or England next week.
Argentina showed good attacking intentions, but repeatedly hit the black brick wall while New Zealand scored with apparent ease.
Michael Cheika's team only got on the scoreboard with two first-half penalties by Emiliano Boffelli.
The Stade de France atmosphere was in sharp contrast to that of the France v South Africa and Ireland v New Zealand quarter-finals, with the decibel levels staying modest throughout the match in an anti-climatic moment for the tournament.
Talk of an unlikely upset, after Argentina beat New Zealand just over a year ago, were brutally dismissed way before halftime as Ian Foster's team scored two early tries and never looked back in a powerful performance.
Argentina were rewarded for their initial dominance with an early penalty, which Boffelli slotted but it was the only time they led.
New Zealand scored on their first foray into the Argentina camp as Jordan touched down after being found unmarked on the right wing.
The All Blacks were way too fast ball in hand and Jordie Barrett added a second try, barging through his tackler and over the line.
Argentina stayed afloat thanks to Boffelli's second penalty but Mo'unga restored the All Blacks' nine-point lead with a routine penalty and Frizell strolled over the line after good work by Mark Telea on the stroke of halftime.
Argentina's slim hopes of a comeback were nipped in the bud early in the second half as it took New Zealand only two minutes to score their fourth try through the impeccable Smith.
Frizell powered over and Richie Mo'unga kicked his third conversion to extend the lead as New Zealand edged inevitably closer to a record fifth World Cup final.
Jordan dived over again to become the tournament's leading try-scoring after Foster had sent on all but one of his replacements, probably looking ahead to next weekend's final.
The All Blacks were reduced to 14 men when lock Scott Barrett picked up a yellow card for slapping down the ball from the Argentina scrumhalf.
But it did not prevent Jordan from touching down for his eighth try of the tournament - two more than France's Damian Penaud.
Mo'unga did not appear to try too hard to convert, missing the chance to claim the biggest World Cup semi-final winning margin the All Blacks set against Wales in 1987 (49-6).
England and South Africa clash in the second semi-final at Stade de France on Saturday.
