Eight of the BBC One show's finalists were due to appear on the tour, which would have debuted at the Bournemouth International Centre on September 12.
It was then due to visit hit venues in Cardiff, Birmingham, Manchester, Liverpool, London, Glasgow and Sheffield.
Speaking to BBC Newsbeat, a spokesperson for the tour confirmed that all dates would be cancelled: "Unfortunately, The Voice UK Live has been cancelled due to lack of ticket sales - customers are advised to contact their point of purchase for ticket refunds."
The Voice UK's ratings battle with ITV's Britain's Got Talent started well, as the BBC One show pulled in more than 10 million viewers in April.
However, by the May semi-final, the show could only attract half that audience.
Winner Leanne Mitchell's debut single, a cover of Whitney Houston's Run To You, failed to make the Top 40 Official UK Singles Chart on release.