This paper aims to delve into the impact of policy changes during the Han Dynasty on the decline of the Huns Empire. Through a comprehensive analysis of the historical background, policy evolution, and interactions between the Han Dynasty and the Huns, it seeks to reveal the influence of various factors such as political, economic, and cultural aspects on the relationship between the Han Dynasty and the Huns. Additionally, the paper explores how these factors contributed to the gradual decline of the Huns Empire.