Su Yuanjie started his professional football career in 2015 when he joined China League One side Tianjin Tianhai.
[1] On 14 March 2015, he made his senior debut in a 2–0 away loss against Beijing Enterprises, coming on for Liu Qing in the 56th minute.
[2] On 12 July 2015, Su scored his first senior goal in a 3–1 home victory over Wuhan Zall.
He made his Super League debut on 4 March 2017 in a 2–0 away loss to Guangzhou R&F, coming on for Zhao Xuri in the 80th minute.
[8] He would gradually start to establish himself as a regular within the team and go on to score his first goal for the club, which was in a Chinese FA Cup game on 13 October 2021 against Beijing Sport University in a 3-0 victory.