Judges rated technical elements in Trusova's performance at 92.35 points, which is an unofficial world record.
The Russian figure skater made a quad salchow and a quad toe loop for the first time in history in her free programme.
Darya Pavlyuchenko and Denis Khodykin won gold in junior pairs. Anastasia Skoptsova and Kirill Alyoshin were first in the junior ice dance. Alexei Erokhov showed the best result in junior men's skating.
"I cannot remember that we had such a successful performance at the junior figure skating championships before. Nine medals out of twelve is simply a fantastic result," Gorshkov said. "I congratulate our juniors' team, all our athletes and, certainly, their coaches," he added.
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