Choijinzhab (; 16 January 1931 â 29 April 2022) was a Chinese Mongol linguist.
Choijinzhab was born in Jirem League, Inner Mongolia, in 1931. After graduating from Ulaanbaatar Normal College in Mongolia in 1949, he taught at a primary school in Ulaanbaatar before returning to Inner Mongolia in 1950. He initially worked as an editor at the Inner Mongolia People's Publishing House, and then studied as a research student at the Central College for Nationalities from 1954 to 1957. After graduating, he took up a post at Inner Mongolia University, where he remained through his career. He was a professor at the university's Institute of Mongolian Studies. He was also the honorary director of the Chinese Academy of Mongolian Language and the director of the Chinese Academy of Ethnic Languages.
Between 1983 and 2022, Choijinzhab was involved with the computerization of Mongolian and the creation of software for writing and editing the language. He also worked on the standardization of the Mongolian script, both within China and internationally, and in 1998-1999 was intimately involved in the encoding of Mongolian in the Universal Character Set and Unicode. He was also involved in the encoding of the Phags-pa script in 20032004.