According to the results of two rentals, the 15-year-old skater scored 261.87 points - 79.93 for the short program and 181.94 for the free program.
The second place was taken by Alena Kostornaya, who was the leader after the short program - 259.83 (89.86 + 169.97) points.
Three winners, despite falling in both rentals, took Alexander Trusova - 226.34 (76.46 + 149.88) points.
Elizaveta Tuktamysheva with the result of 204.63 (75.74 + 128.89) points took fourth place.
Evgenia Medvedeva withdrew from the competition.
Earlier it was reported that Shcherbakova exceeded the world records of Trusova and Kostornaya.