The event runs from 9am to 6.30pm each day at the South of England Showground, Ardingly.
It will be a little different this year, with restricted visitor numbers because of the Covid-19 pandemic.
But organisers say the 2021 show will take visitors back to the event’s roots with agriculture, country pursuits, displays and demonstrations.
We’re taking a look back ourselves with a selection of pictures from shows over the past two decades.
13. Student display
Oathall students with their display at the South of England Show in 2007.
14. Duke of Norfolk
The Duke of Norfolk opening the South of England Show in 2008 with one of his wife's Gloucester Old Spots. Picture by Malcolm McCluskey
15. Brinsbury College
Daniel Goodman from Brinsbury College in Pulborough. Pictured at the South of England Show in 2008.
16. Show jumping
A young rider takes a jump at Ardingly's South of England Show in 2008.