The supermarket has already invested an extra £1.6bn with British suppliers since the start of the pandemic as it continues to grow across the UK.
The figure includes £125m more spent with British meat, poultry and dairy farmers.
The pledge will aim to help hundreds more small British businesses to grow with Aldi.
Aldi has also pledged to create 2,000 UK jobs during 2022 as it aims to open an average of one new store a week.
Meanwhile, from next month, all store colleagues will be paid a minimum of £10.10 an hour nationally, or £11.55 for those inside the M25.
Giles Hurley, CEO, Aldi UK, said: “We were the fastest-growing supermarket in the UK in 2021 and that has only been possible by working closely, over long periods, with hundreds of British suppliers.
“As we continue to grow, opening new stores across the UK, we are determined to ensure that the vast majority of our grocery products continue to come from British suppliers, just as they do now.”