It is De Vanna's third stint with Victory, as she returns to Australia's domestic competition having most recently played for Fiorentina in Italy's Serie A women's championship.
“It’s wonderful to be back at Victory,” the attacker said. “The professionalism and competition at training has been excellent.
"Everyone is working hard on the training tack and we are hungry to improve on the foundations of the past couple of seasons.
“We play football to perform for our members and fans, and we can’t wait for the season to start and play in front of them again. It’s going to be an exciting season.”
De Vanna, 36, is the Matildas all-time top scorer with 47 goals in 150 caps and a veteran of four FIFA Women's World Cups and two Olympic campaigns.