Urban agglomeration has become an important carrier of China’s economic development and urbanization. Recently，integration strategy of Beijing-Tianjin-Hebei has become a hot topic in research circles. Reasearch on the issue of Beijing-Tianjin-Hebei development focused on the city of unbalanced development of criticism，and attributed to the administrative guidance，the allocation of resources. The study of objective factors and dynamic mechanism is inadequate. In order to find a better path for the Beijing-Tianjin-Hebei collaborative development，this paper drawing on city space，explore the objective conditions resulting in the imbalance of regional development of Beijing-Tianjin-Hebei from spatial difference，historical development perspective.