Graduated from Beijing Dance Academy in 2014, Jiang Xin joined the National Ballet of China. There he danced many repertoires of the Company, such as The Red Detachment of Women, Raise the Red Lantern, The Peony Pavilion, Swan Lake, Giselle, Don Quixote, Onegin, Sylvia, Firebird, The Nutcracker (Chinese Version), The Yellow River, The New Year's Sacrifice, Rachmaninoff Piano Concerto No.3, Carmen, L' Arlesienne, The Little Mermaid, The Rite of Spring", The Butterfly Lovers Pas de Deux and Variation for Four. He also participated in the choreography and performance of the Ballet Workshop hold by the Company from 2010 to 2014.

He has toured with the Company in in Hong Kong, Macau and Tai Wan as well as many countries all around the world, such as USA, UK, France, Russia, Germany, Netherlands, Switzerland, Canada, Brazil, South Korea, Spain, Australia, North Korea, and so on.

From 2014 to 2017, he served as a soloist in Hong Kong Ballet and danced many leading roles in ballet works including The Lady of the Camellias, The Nutcracker, Swan Lake, Romeo and Juliet, The Sleeping Beauty.

After his return to the National Ballet of China in 2017, he has danced Song of the Earth and Spring and Fall choreographed by John Neumeier. In the same year, he danced as one of the "Two Male Flying Apsaras" in The Light of Heart, a new-created ballet in two acts by the Company. He also participated in many other repertoires of the Company such as La Bayadère, The Crane Calling and so on. In 2017, he toured with the Company to Germany to participate in the Hamburg Ballet Days. While in 2018, he toured with the Company to North Korea with The Red Detachment of Women and Giselle.