As the officer in the Jin Dynasty, Dutong ran through the whole development of the regime, and the ethnic composition of the different natures of Dutong was vastly different. In the early Jin Dynasty, Dutong of armies internal and external as well as Dutong of administrative districts were all held by Jurchen with a strong military and political nature, showing a single ethnic characteristics. But with the change in the nature of Dutong and the absorption of other ethnic components within the Jin army, Han, Bohai, KHitan and Xi people entered the ranks of Dutong, which made the ethnic components of Dutong diversified. As a result, the Dutong with only military functions maintained the structure of Jurchen as the main and the participation of other ethnic groups. However, due to the influence of ethnic policy and political changes in the periods of Hailing and Xuanzong, the non-Jurchen components became prominent. The ethnic composition of Dutong of the Jin Dynasty changed from single to diversified, which enriched the fighting means and modes of the Jin army, and promoted the interaction, communication and fusion among various ethnic groups in the Jin Dynasty.