"I can't wait to see everyone at the Furnace this summer and hopefully I can provide some entertainment for the Members and fans!"
Livingstone is the first international signing for Scorchers this season. "We're very pleased to have secured Liam for the upcoming season," Scorchers head coach Adam Voges said.
"He has performed really well in T20 cricket all around the world over the past 12 months.
"Liam's a great all-round package, he'll give us some aggression at the top of the order, he is a handy spinner and a fantastic fielder.
"We're excited about what Liam can bring to the Scorchers this season and I'm sure he'll become a fan favourite very quickly," he added.
The 26-year-old burst onto the scene in 2015 after he scored 350 runs from just 138 balls during a One-Day match for club side Nantwich.
Perth Scorchers Squad: Mitchell Marsh (c), Fawad Ahmed, Ashton Agar, Jason Behrendorff, Cameron Bancroft, Cameron Green, Aaron Hardie, Nick Hobson, Josh Inglis, Matt Kelly, Liam Livingstone, Joel Paris, Jhye Richardson, Ashton Turner, Andrew Tye, Sam Whiteman.