Ronan Keating, Mikey Graham, Shane Lynch and Keith Duffy will release the track on 17 November as part of their 20th anniversary celebrations.
'Love Will Save The Day' was produced by Brian Rawling, who has worked with Ronan, Cheryl Cole and One Direction in the past and is described as a "towering pop anthem."
It had its first UK play on Radio 2 today but the boys had previously performed it as part of a Greatest Hits medley on Australian X Factor.
Listen to it here:
'Love Will Save The Day' is the first single to be taken from their new album BZ20, which is released 25 November through Warner Music.
In addition to the new music, the foursome will hit the road in November for a multi-city UK and Ireland tour, kicking off in Dublin on 28 November, wrapping up 22 December in Manchester.
Boyzone burst onto the music scene twenty years ago with a performance on Irish TV show The Late Late Show and went on to achieve record sales of twenty five million, four number one albums and six number one singles.
Fifth member Stephen Gately passed away in 2009.