[1] A total of thirteen teams played in the tournament, with players born on or after 1 January 2001 eligible to participate.

Like the previous editions, the tournament acted as the AVC qualifiers for the FIVB Volleyball Girls' U18 World Championship.

The top four teams qualified for the 2019 FIVB Volleyball Girls' U18 World Championship as the AVC representatives.

The thirteen AVC member associations (including the India volleyball team under the Indian Olympic Association, who was suspended by the FIVB, and whose suspenion was lifted in May 2018) participated in the tournament, with Thailand already qualified as host country.

Each team, as well as the host side, were assigned into a pool according to their previous ranking (2017 Asian Girls' U18 Volleyball Championship).