Liu Lu (; born 2 April 1989) is a Chinese researcher in the field of mathematics at Central South University in Changsha, Hunan.
When he was a 22-year-old undergraduate student, Lu proved that Ramsey theorem for infinite graphs (the case n = 2) with 2-coloring does not imply WKL<sub>0</sub> over RCA<sub>0</sub>, solving an open problem left by English logician David Seetapun in the 1990s ().