Liu Hongji (Chinese: 刘弘基; 582 - 650[1]), titled Duke Xiang of Kui, was a general and officer in the early Tang dynasty of China.

He was drafted to the military service during Emperor Yang of Sui's campaigns against Goguryeo, but he was late for the duty, which might lead to a death penalty.

[5] His move cleared the flank for Li Yuan's main force who were attacking the Sui capital Daxing (on the southern bank of Wei River, better known as Chang'an) from the east.

After Li Yuan captured Daxing and formally established the Tang dynasty, Liu Hongji was honored for his outstanding contribution.

[7][8][9] In 624, the court sent Liu Hongji and Li Shentong (Prince of Huai'an) to Binzhou, a frontier town north of Chang'an, to guard the border between Tang and Tujue.

[14] In folk stories, Liu Hongji was one of the four close guards (along with Yin Kaishan, Duan Zhixuan and Ma Sanbao) to protect Li Shimin when he was the Prince of Qin.