Emperor Wen of Liu Song (Liu) Song Wen-di) (407–453), personal name Liu Yilong, nickname Che'er, is an emperor of the Chinese dynasty Liu Song.

He is the third son of the dynastic founder Emperor Wu (Liu Yu).

After his father's death in 422, Liu Yilong's eldest brother Liu Yifu takes the throne as Emperor Shao.

In 424, a group of officials, believing Emperor Shao to be unfit to be emperor, deposes Emperor Shao and places Liu Yilong on the throne as Emperor Wen.

In his 29 years of rule, Emperor Wen largely continues the grand plan of his father and some of the land policies of the Jin Dynasty.

The period, called the "Yuanjia administration", is seen as a period of prosperity and strength, because of the emperor's diligence and ability to find capable and honest officials to serve in his administration.

However, Emperor Wen is faulted for making repeated failed attempts to attack rival Northern Wei and using the wrong strategies in doing so, weakening his state toward the end of his rule.

In 453, angry that his crown prince Liu Shao is using witchcraft to curse him, he plans to depose Liu Shao; when this plan is leaked, Liu Shao stages coup and assassinates him, replacing him on the throne, although less than a year later Liu Shao's younger brother Liu Jun defeats him and takes the throne as Emperor Xiaowu.