Wang Jiayin (?-1631) was an early leader of the peasant uprising in the late Ming Dynasty. A native of Fugu County (now a native of Kuanping Village, Huangfu Township, Fugu County, Shaanxi Province). In the first year of Chongzhen (1628), due to the lack of food in the year, he and Wu Yangui and others organized a large number of local victims to rise up and fight against the officers and soldiers, thus opening the prelude to the peasant uprising at the end of the Ming Dynasty.

After Wang Jiayin's uprising, the responders flocked to it, Gao Yingxiang, Wang Ziyong and others led the people to take the initiative to follow Wang Jiayin's call to act together, and the bee fire burned all over Shaanxi for a while, and spread to Jin, Ning, and Gansu provinces, and the uprising team grew to more than 20,000 people.

In the fourth year of Chongzhen (1631), the rebel army was besieged by Cao Wenzhao's heavy troops and occupied the area of Yangcheng, Shanxi. In the Battle of Yangcheng, Wang Jiayin was killed by spies at the age of more than 40. The rest of the troops were under the command of the king himself.

Wang Jiayin used to be a border soldier, and then fled and returned to China. In the first year of Chongzhen, due to the lack of food in the year, he led the people to revolt in Fugu. Later, Wang Er of Baishui County, Shaanxi Province led his troops from Chengcheng to vote, gathered more than 6,000 people, and was the first to raise the banner of the peasant uprising at the end of the Ming Dynasty. Wang Er died the earliest, and Wang Jiayin called the king, set up officials to develop to more than 30,000 people, turned to Shaanxi, Shanxi, Gansu and other places, the momentum was huge, and once defeated the main force of the Ming army led by the Ming Dynasty military department Shangshu Hong Chengchou.

After the peasant uprising at the end of the Ming Dynasty, the leaders Gao Yingxiang, Li Zicheng, Zhang Xianzhong, Wang Ziyong and others were all Wang Jiayin's subordinates in the early years, but after Wang Jiayin's sacrifice in 1631, Li Zicheng and Zhang Xianzhong became famous.