Qin Yilu (died 199) was an official serving under Lü Bu, a general who formerly served Dong Zhuo and later became a warlord who lived in the late Eastern Han dynasty. Allowing for variant writing in the records, Qin Yilu was probably the same person as two others named Qin Yi (秦翊 and 秦誼).
Born in Yunzhong commandery (雲中縣) of Bing province, Qin Yilu served under Lü Bu, who was from the same province. In 192, Qin was one of the men ordered by Lü Bu to ambush and kill Dong Zhuo in Chang'an, dressed as guards. He apparently followed Lü Bu as the latter fled Chang'an and roamed the Central Plains.
When Lü Bu was besieged by the allied forces of Cao Cao and Liu Bei at the Battle of Xiapi in 198, Lü Bu sent Qin Yilu to ask for reinforcements from the warlords Zhang Yang and Yuan Shu. Qin Yilu's wife, Lady Du (杜氏) and their son Qin Lang were left behind in Xiapi and stayed there as the city fell. Liu Bei's general Guan Yu repeatedly made requests to Cao Cao, asking to marry Lady Du after their victory over Lü Bu. Cao Cao was curious about why Guan Yu wanted Lady Du so badly that he guessed that she must be very beautiful, so he had her brought to him. And so, despite Guan Yu's pleads, Lady Du became Cao Cao's concubine and Qin Lang his adopted son.
Qin Yilu was at Yuan Shu's camp when Xiapi fell. To replace his lost wife, Yuan Shu arranged a marriage between Qin Yilu and a noble lady from the imperial clan of the Han dynasty. However, Yuan Shu began to have designs on the imperial throne. Qin Yilu, uneasy of being associated with a rebel emperor, heeded Liu Fu's advice and surrendered to Cao Cao, who controlled the formal Han government and the Han emperor.
Under Cao Cao, Qin Yilu was given a position as the chief of Zhi (銍長), a small county in the state of Pei (沛國). When Liu Bei rebelled against Cao Cao and passed by Xiaopei, Liu Bei's general Zhang Fei called on Qin Yilu and scorned him: "Your wife has been taken by another man, and yet you became a magistrate under him! How can you behave so ignorantly as though nothing has happened! You wish to follow us?" Qin Yilu followed Liu Bei and travelled for several li before he regretted and decided to leave, but he was killed by Zhang Fei.
- de Crespigny, Rafe (2007). A biographical dictionary of Later Han to the Three Kingdoms (23–220 AD). Brill. p. 708. ISBN 978-90-04-15605-0.
- (布之被圍，關羽屢請於太祖，求以杜氏為妻，太祖疑其有色，及城陷，太祖見之，乃自納之。) Xiandi Zhuan annotation in Sanguozhi vol. 3.
- (初，羽隨先主從公圍呂布於濮陽，時秦宜祿為布求救於張楊。羽啟公：「妻無子，下城，乞納宜祿妻。」公許之。及至城門，復白。公疑其有色，李本作他。自納之。) Huayang Guo Zhi vol. 6.
- (宜祿歸降，以為銍長。及劉備走小沛，張飛隨之，過謂宜祿曰：「人取汝妻，而為之長，何蚩蚩若是邪！隨我去乎？」宜祿從之數里，悔欲還，飛殺之。) Xiandi Zhuan annotation in Sanguozhi vol. 3.
- (朗隨母氏畜于公宮，太祖甚愛之，每坐席，謂賔客曰：「豈有人愛假子如孤者乎？」) Xiandi Zhuan annotation in Sanguozhi vol. 3.