Steve Cuss’s side were 2-0 victors over Bristol Rovers at Dean Court, thanks to goals from Jenna Markham and Katie James.
Markham opened the scoring after 35 minutes, finishing after getting to a soft header back to keeper Georgina Hunt from Chloe Bassett was latched onto by the striker.
It was a slightly scrappy game as the Cherries were not able to pull away, but they doubled their advantage with 22 minutes left to play.
Substitute Ellie Strippel did brilliantly on the left-hand side to create space to cross, her floated cross perfectly weighted for Katie James to volley home from close range at the far post.
And the Cherries saw out the 2-0 win and were crowned champions.
Steve Cuss’s side have won 18 out of 18 games so far this campaign, to clinch the title with four games left to play.