The White Ferns had been left in a spot of hassle having been bowled out for 91 in 18.2 overs however their bowlers produced a shocking show to dismiss Bangladesh 17 runs quick.
Bangladesh was dismissed for 74.
Ritu Moni’s (4/18) first four-wicket haul, the perfect figures of the match thus far, was not sufficient to steer Bangladesh to a historic victory.
It was solely the third time the White Ferns had been saved below 100 runs at a World Cup, however it was clear they weren’t going to go down with out a combat as Jensen (3/11) and Kasperek (3/23) made amends.
Finding itself at 32 for 3 on the halfway level, Bangladesh’s try to decrease the asking price proved expensive.
The win for New Zealand means Group A is completely arrange for a trans-Tasman showdown on Monday, with the winner set to attain the semifinals.
The scores: New Zealand 91 in 18.2 overs (Rachel Priest 25; Ritu Moni 4/18, Salma Khatun 3/7) bt Bangladesh 74 in 19.5 overs (Hayley Jensen 3/11, Leigh Kasperek 3/23).