The full-back saw off competition from Mohamed Salah and Jordan Henderson to clinch the award for a second time in 2019-20, having also picked up December’s edition.
Alexander-Arnold started five of the Reds’ six fixtures during the month as they strengthened their grip at the summit of the Premier League table.
The No.66 also claimed two assists during the 3-2 victory over West Ham United at Anfield on February 24.
2019-20 Standard Chartered Player of the Month winners
August: Mohamed Salah
September: Roberto Firmino
October: Alex Oxlade-Chamberlain
November: Sadio Mane
December: Trent Alexander-Arnold
January: Mohamed Salah
February: Trent Alexander-Arnold