"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."
White has scored 14 goals in 71 games for the Football Ferns since she made her senior debut in 2009.
"I am absolutely delighted to be able to join Liverpool Ladies and experience the Women's Super League," she told Liverpool's website.
"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."