When Chen Sheng 陳勝 rose against the Qin dynasty 秦 (221-206 BC), he joined the rebellion as palace receptionist (zhongjuan 中涓) of Liu Bang. He followed Liu Bang in the conquest of the Qin capital Xianyang 咸陽 (modern Xianyang, Shaanxi). Liu Bang bestowed him the title of Lord Linping 臨平君 and, after being made King of Han by the hegemonial lord Xiang Yu 項羽, Liu Bang granted Jin She the title of Marquis of Jianwu 建武侯 and appointed him to the post of commandant of cavalry (jiduwei 騎都尉).
Jin took part in Liu Bang's war against Xiang Yu, and after Liu Bang adopted the title of emperor, Jin She was made Marquis of Xinwu 信武侯 and appointed commandant of the cavalry and the chariots (cheji duwei 車騎都尉). Jin She participated in the wars against the rebels Chen Xi 陳豨 and Ying Bu 英布.
His posthumous title is Marquis Su 肅侯.