Born in Meizhou, Guangdong,[1] Xie started his football career with Shandong Taishan, where he was a part of youth side which won a Chinese U-16 League title in 2017,[2] and was selected as a candidate for the 2017 Golden Boy at the under-16 level.

[7] On 29 August 2021, China League Two club Qingdao Hainiu announced the loan signing of Xie from Shandong Taishan.

[18] Xie made his AFC Champions League debut four days later on 19 September 2023 in a group stage match against Filipino side Kaya, scoring a goal that was ultimately ruled offside.

[25] On 8 March 2024, Xie Wenneng received his first call-up for the senior national team, in preparation for two matches in the second round of 2026 FIFA World Cup qualifiers, both against Singapore.

[27] On 10 October 2024, Xie scored his first international goal against Australia in a World Cup qualifying match, which eventually ended in a 3–1 defeat.