The 2021 Swiss Mixed Doubles Curling Championship was held from January 27 to 30, 2021 at the Curlinghalle AG Biel in Biel, Switzerland.

[1] The winning pair of Briar Hürlimann and Yannick Schwaller then played against the 2020 Swiss champions Jenny Perret and Martin Rios for the right represent Switzerland at the 2021 World Mixed Doubles Curling Championship.

The event was held in a round robin format between the eight competing teams.

The winner of the semifinal then played the first place team in a best of three to determine the winner.

[2] The teams are listed as follows:[3] Final Round Robin Standings[4] All draw times are listed in Central European Time (UTC+01:00).