The 36-year-old striker has scored 29 goals in 33 games.
Romelu Lukaku from Inter (24 goals) was second on the list of goalscorers, while Luis Muriel from Atalanta was third (22 goals).
Thus, for the first time in three years at Juventus, Ronaldo became the top scorer of the Italian championship.
Earlier it was reported that Alvaro Morata's double helped Juventus defeat Bologna in Serie A and reach the Champions League.