10 teams entered this edition, with 2 games being played in the first round before the quarter-finals stage.
The competition was only open to teams that played in the 2019–20 Hong Kong Premier League.
The final of the Senior Shield was originally held on 9 February 2020, but was postponed to 2 October 2020 and was played behind closed doors due to the 2020 coronavirus pandemic in Hong Kong.
Eastern became the champions for the 11th time after beating Lee Man in the final.
Source: HKFA Bold = winner * = after extra time, ( ) = penalty shootout score