They beat Argentina 19-17 in a closely-contested final to win their fourth tournament of the series, the first time they have done that since 2013-2014.
In the final, they made an invaluable start with a try in the first minute after the man of the final, Leroy Carter, made a sizzling outside break for Regan Ware to cross and then pass to Dylan Collier, better-placed inside him.
Under pressure in front of their posts four minutes into the spell, the New Zealanders pulled off a counter ruck and moved the ball for Carter to give Moses Lio a chance to put his powerful fend to use to beat two Argentine defenders on a 75m run to score.
Argentine got one try back through Joaquin Pellandini and should have had a second, but Marcos Moneta was given a dreadful pass that went into touch.
They did score from their kick-off after halftime when German Schulz scored. Again they claimed the restart and should have been able to exert more pressure. However, they overthrew a lineout ball in the All Blacks' 22. Brady Rush raced onto the ball and into space and cleared out on an 85m run to score what proved to be the matchwinner.
Moneta scored on full time, but the All Blacks had a scoring cushion and claimed the win.
Co-captain Collier said it was a huge effort to claim back-to-back titles over the two weekends, and their success was built on the back of their defence.
Carter said sorting their Olympic Games qualification was their first goal, and now they had achieved that; it was about wrapping up the series.
"It's been exciting. The new boys coming and performing make it exciting," he said.
With two tournaments in Toulouse and London left, the All Blacks Sevens have 164 points, 24 ahead of second-placed Argentina. Fiji, who finished third, are in third place, with 130 points, France is fourth with 122, and Australia moved into fifth place with 112 points. Samoa is sixth on 111.
In their semifinal, New Zealand beat Fiji 19-10 and won their quarterfinal against Britain 22-10.