King Sosurim has spent most of his reign and life trying to keep Goguryeo under control and strengthening royal authority.

Although he is not able to avenge the death of his father and previous Goguryeo ruler, King Gogugwon, he has played a major role in setting up the foundations that make possible the great conquests of his nephew and later ruler of Goguryeo, King Gwanggaeto the Great.

He dies in 384 and is buried in Sosurim, which is a forest in Goguryeo.