Li Jinxi (Chinese: ???; pinyin: Là Jinxi; Wade–Giles: Li Chin-hsi; February 2, 1890 – March 27, 1978) was a Chinese linguist and educator.
In 1911, he graduated from the Hunan Teachers College.
He participated in the China Alliance Committee in his early years and launched the Jiusan Society in 1946.
He was the chief editor of Changsha Newspaper and professor of Hunan No.1 Normal College.
After that he held the positions of the Dean of the College of Arts of Beijing Normal College (now Beijing Normal University), Peking University, Yanjing University, the National Northwest Joint University (now Northwest University), Hunan University and Beijing Normal University as the president of Literary College.
After 1949, he became the president of the Chinese Language College of Beijing Normal University, a committee member of the Chinese Academy of Social Sciences, a committee member of the Chinese Writing Reform Committee, and the standing committee of the Jiusan Society.
He devoted his life to studying and teaching language, making great achievements on the Chinese grammar.
He made great contributions to the Writing Reform, and was regarded as "The Father of the Chinese phonetic alphabet".