The 22-year-old, who has 71 caps and 14 goals for her country, joins the side for the second half of the season after the break for the FIFA Women’s World Cup in Canada.
White told the club website a move to England was always something she wanted to do with the opportunity to play in the Champions League with Liverpool a big draw card.
“I am absolutely delighted to be able to join Liverpool Ladies and experience the Women’s Super League,” White said.
“The prospect of moving to England has always been an attractive proposition to me, so to be able to join the reigning champions and play in the UEFA Women’s Champions League is extremely exciting.”
Liverpool manager, Matt Beard said: “I am really pleased that we have been able to secure the signing of Rosie as I have been keen to improve my striking options since the beginning of the mid-season break.
“I have watched Rosie for New Zealand a number of times and have always been impressed by her. Rosie will add something different in the final third for us and I am looking forward to working with her.”
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