It gave new manager Luke Williams victory in his first League One game in charge and raises hopes that Posh can now dig themselves out of trouble.
Harry Leonard put Posh two up inside the opening 16 minutes before Kyrell Lisbie made it 3-0 before half-time.
There was only going to be one winner from there with Gustav Lindgren adding two late goals to complete the rout.
Posh remain four points adrift from safety going into the international break.
Our man David Lowndes was on hand to snap some of the fans who saw the cracking win. Take a look here and see if anyone you know features,
Get the latest Posh news here.

1. Posh 5 AFC Wimbledon 0
Peterborough United boosted their survival hopes after hammering AFC Wimbledon 5-0. Photo: David Lowndes

2. Posh 5 AFC Wimbledon 0
Peterborough United boosted their survival hopes after hammering AFC Wimbledon 5-0. Photo: David Lowndes

3. Posh 5 AFC Wimbledon 0
Peterborough United boosted their survival hopes after hammering AFC Wimbledon 5-0. Photo: David Lowndes

4. Posh 5 AFC Wimbledon 0
Peterborough United boosted their survival hopes after hammering AFC Wimbledon 5-0. Photo: David Lowndes


