中文摘要：

城市密集区是城市化发展到高级阶段的一种地域空间组织形式，是社会经济发展的主体。对城市密集区进行空间划分与识别，有助于明确国家开发格局和促进区域的一体化发展。本文在已有研究成果的基础上，根据中国城市化发展的水平和阶段，从中心城市、标准市、其他中小城市和城镇、边界识别等方面界定了中国城市密集区的识别标准，并通过基于交通可达性测算的城市密集区边界划分，将中国城市划分为15个典型城市密集区和8个准城市密集区，形成“三纵两横”的城市密集区空间格局。通过与国家主体功能区规划的对比发现，本文提出的城市密集区划分方案与国家主体功能区规划提出的城市化战略格局基本相符，城市密集区的发展应在国家主体功能区战略指导下，参照规划设定的定位和目标，选择适合的路径和方向。

英文摘要：

The urban concentrated area is a form of regional organization in the advanced stage of urbanization. It is benefit for clearing national development framework and promoting regional integration to divide and identify the urban concentrated area spatially. Based on the existing research results, according to the level and stage of China＇s urbanization, this article defines the space identification standards of urban concentrated areas in China, including such aspects as the core city, standard city, other small cities and towns, and boundary identification, then divide Chinese cities into 15 typical urban concentrated areas and 8 quasi-urban concentrated areas based on the traffic accessibility. They present a spatial pattern of ＂three vertical and two horizontal distributions＂, which construct a national system of urban concentrated areas. Compared with the main function areas of the national plans, the proposed program of urban concentrated areas is consistent with the strategy pattern of urbanization in the national plans of main function areas on the whole. Under the guidance of the strategy of the national main function areas, the urban concentrated areas should develop in the light of the positions and goals in the plans to select the right path and direction.