The 18-year-old from Melbourne qualified for finals in 12th place, and then stepped it up in finals, winning the first round to advance to the super-final medal round.
As the last competitor in the super-final, Hill performed well under pressure for his highest score of the day with 83.83 points, to take the win by 1.55 points over American Nash Lucas, with another American Camden Lewis in third 1.9 points behind Hill.
Also making finals for Australia were Xanthia Coote (8th), Emma Bosco (13th), Mac Livissianos (14th) and Lottie Lodge (16th).
In the dual moguls, Lucy Pernice (9th), Xanthia Coote (11th), Talia Manns (14th) and Ed Hill (16th) all made it through to the quarter-final round.
Moguls
Men
1st Edward Hill
14th Mac Livissianos
24th Tristan Rowley
33rd Bradley Manns
Women
8th Xanthia Coote
13th Emma Bosco
16th Lottie Lidge
19th Talia Manns
23th Lucy Pernice
35th Indi Speirs
39th Eliza Peake
Dual Moguls
Men
15th Edward Hill
17th Tristan Rowley
31st Bradley Manns
41st Mac Livissianos
Women
9th Lucy Pernice
11th Xanthia Coote
14th Talia Manns
25th Eliza Peake
29th Lottie Lodge
34th Emma Bosco
59th Indi Speirs