Murray, 32, a five-time runner-up in Melbourne, has been given a protected ranking of number two.
At this year’s australian open, the three-time Grand Slam champion said he feared it could be the last tournament of his career because of a hip injury.
He had surgery in January and last week reached his first singles quarter-final in more than a year at the China Open.
Announcing his return, the Australian Open said Murray would “return to the main draw with a protected ranking of number two and restored physical powers”.
The Scot, who is now ranked 289th in the world, plays Italy’s world number 12 Fabio Fognini in the second round of the Shanghai Open on Tuesday.
Australian Open organisers added that Belgium’s former world number one Kim Clijsters could feature in the year’s opening Grand Slam in the women’s draw.
Four-time Grand Slam champion Clijsters will return to the wta tour in 2020 at the age of 36.