Liu Zixu (born 27 August 1997) is a Chinese para biathlete who competed at the 2022 and 2026 Winter Paralympics.
Liu represented China at the 2022 Winter Paralympics and won a gold medal in the men's 6 kilometres sitting event. This was China's first gold medal at the 2022 Winter Paralympics, and their second-ever Winter Paralympics gold. He also won a bronze medal in the men's 12.5 kilometres event.