After bowling out the African nation for just 162, the Kiwis rode on unbeaten half-centuries by Martin Guptill and Brendon McCullum to canter to the target with 99 balls to spare at the Sardar Patel Stadium.The opening par tnership between Guptill (86) and McCullum (76) was the highest for the tournament.
The victory, the second for New Zealand by a 10-wicket margin in the tournament, moved them up in the table with four points from three games. Pakistan lead the charts with three wins from as many matches.
Guptill, named man of the match, launched New Zealand's chase with a bang, carting seven fours and two sixes off 108 balls on way to his 10th one-day international half-century.
McCullum was equally belligerent, hitting six fours and two sixes in his 95-ball knock.
"It was a good partnership," said McCullum.
"It was definitely made a lot easier by the way we bowled. I thought we were outstanding with the ball."
"A win like this is very good for confidence."
New Zealand captain Daniel Vettori echoed the opinion of his wicketkeeper-batsman.
"I think it's the performance that we were looking for. Now we've got to replicate that against some of the bigger nations," he said.
Zimbabwe captain Elton Chigumbura cut a sorry figure as he tried to explain his team's capitulation.
"It was a very disappointing game from us from ball one up to the end," he said.
"Losing quick wickets is a problem. It's a game we will like to forget quickly and move onto the next one."
Earlier, seamers Tim Southee, Kyle Mills and Scott Styris and spinner Vettori shared the wickets after Chigumbura won the toss and elected to bat on a benign wicket.
But it was not a start Zimbabwe would have wished for, losing its top five batsmen inside 15 overs to a combination of New Zealand's pace and spin.
Opener Charles Coventry was the first to go, run out with just two runs on the board as Hamish Bennett at mid-on threw the stumps down at the bowler's end.
Tatenda Taibu, coming into the game on the back of a match-winning 98 against Canada, earned a reprieve when Vettori failed to pouch a sitter off Southee.
But the bowler was rewarded off the very next ball when he had Taibu trapped leg before wicket for 8, a decision upheld after television replays showed Southee's ball would have hit the off-stump.
Mills, back in action after missing his team's seven-wicket defeat to Australia, sent back Craig Ervine for 11 before Vettori dismissed Chigumbura and Regis Chakabva in his first over to leave Zimbabwe in deep trouble at 5 for 46.
Opener Brendan Taylor (44) waged a lonely battle until he was struck on the pads against the gentle pace of part-timer Styris to be dismissed six runs short of a deserved half-century.
Greg Lamb was the second run-out victim of the game, failing to make his ground after being sent back by partner Prosper Utseya (36).
