After a sole season with the side (also being topscorer), he moved to Avellino, after refusing to play for Salernitana.
[5] In August 2021, Biancolino returned to Avellino as the assistant coach of Tonino Iandolo in charge of the Primavera Under-19 team.
[8] He was in charge of the team for a single league game, a 0–2 loss to Viterbese, before being replaced by new permanent boss Massimo Rastelli.
On 22 September 2024, following the dismissal of Michele Pazienza after a negative start to the new season, Biancolino was once again instated as caretaker head coach of Avellino.
[9] After a string of positive results, on 5 October 2024 Avellino confirmed Biancolino would stay on as the permanent head coach of the first team.