春秋战国时期，中原迁入或从中原逃归的狄人多分布于内蒙的南部地区，阴山以北及大兴安岭地区则是分散的狄族部落较多的区域。匈奴初居于今内蒙古的东部相邻地区，后迁入河套及大青山一带发展壮大起来，战国时期应处于阶级社会并建有初步的国家形态。 During the Spring and Autumn Period and the Warring States Period, Di people who moved into the Central Plains or escaped from the Central Plains were mostly located in the southern part of Inner Mongolia. The areas north of Yinshan and the Greater Khingan Range were scattered areas with more Tribal tribes. The Hsiungnu first lived in the adjoining area to the east of Inner Mongolia today, and later moved into the vicinity of Hetao and Daqingshan. The Warring States Period should be in a class society with a preliminary state form.