The move came from new owners the Issa brothers who, together with TDR Capital, acquired a majority stake in the supermarket chain from US owners Walmart.
NFU Deputy President Stuart Roberts said: "It’s fantastic to see Asda’s new owners already making such strong commitments when it comes to championing British produce.
“The commitment to 100% British beef and increasing its proportion of UK suppliers across a range of products demonstrates recognition of the values at the heart of British food production – quality, traceability and sustainability.
“This is a very exciting time for Asda and I look forward to continuing our work with the Asda team into the future."