A former child actress, singer and model, she trained under Pledis Entertainment for nine years before making her official debut as a member of the girl group Pristin in 2017.

[1][3] As a child, she appeared in several commercials for various companies and products, and most notably, a safety video for Korean Air.

[1][5] Under the name Park Si-yeon, she, along with six other female trainees of her company, joined the Mnet survival program Produce 101 which aimed to create an eleven-member girl group from a pool of 101 female trainees from various entertainment companies in South Korea that will promote for a year under YMC Entertainment.

[13] In August 2017, Pristin released their second extended play Schxxl Out with two songs co-composed by Xiyeon and three with lyrics co-written by her.

[17] In May 2020, Park announced through her Instagram account that she would continue her career as an actress and was working on an independent film, later titled as Dieter Fighter.