Based on the results of two skates, Shcherbakova scored 264.10 points: 80.31 for the short program and 183.79 for the free program.
For the 16-year-old figure skater, this is the third consecutive victory in the national championship.
The second place was taken by Kamila Valieva - 254.01 (79.99 + 174.02) points.
The three winners were closed by Alexandra Trusova - 246.37 (75.76 + 170.61) points.
Elizaveta Tuktamysheva took the final, seventh place, gaining 204.25 (73.56 + 130.69) points on the sum of two performances.
Earlier it was reported that Evgeni Plushenko was pleased with Trusova's marks for an arbitrary program at the Russian Championship.