In 214, after the warlord Liu Bei seized control of Yi Province from its governor Liu Zhang, he appointed Yin Mo as an Assistant Officer of Education (勸學從事). In 221, Liu Bei declared himself emperor and founded the state of Shu Han, after which he designated his son Liu Shan as the Crown Prince. Yin Mo, who was appointed as the Crown Prince's Coachman (太子僕), tutored Liu Shan in the "Zuo Zhuan" and Confucian classics. Liu Bei died in 223 and was succeeded by Liu Shan, who appointed Yin Mo as a Counsellor Remonstrant (諫議大夫) in the Shu imperial court. Around 227, when the Shu chancellor-regent Zhuge Liang garrisoned military forces in Hanzhong in preparation for a series of campaigns against Shu's rival state Cao Wei, Yin Mo was appointed as an Army Libationer (軍祭酒) under Zhuge Liang. In 234, after Zhuge Liang's death, Yin Mo returned to the Shu capital Chengdu and held the position of a Palace Counsellor (太中大夫). He died on an unspecified date. His son, Yin Zong (尹宗), inherited his legacy and became an Academician (博士) in the Shu court.