随着经济社会、城镇化进程的不断发展以及相关政策的大力支持，城市空间的拓展与生长成为我国西北地区绝大多数城市今后相当一段时间的主要任务。带状河谷型城市是西北地区东部城市形态在自然环境约束下空间拓展成本最小化选择的一种必然。然而，这种城市形态的局限性带来的功能布局、交通组织和空间环境等问题的严重制约，使得这类城市布局的合理性难以为继，发展受到极大限制。本课题将在对西北地区东部河谷型城市大尺度范围生态安全格局进行研究的基础上，对中心城区空间生长形态绩效进行分析，通过选择适宜的形态测度指标体系，建立城市空间形态生长综合阻力模型，最终提出西北地区东部带状河谷型城市的适宜性形态模式。从城市所处自然环境和地域空间角度寻找出未来河谷型城市拓展、可持续生长的新的必然。这对于促进城市经济、社会、环境、生态和空间形态的协调发展，构建资源节约型、环境友好型人居环境，塑造地域城市特色，具有重要的理论意义和实践意义。

Along of the development of economy, society, and urbanization process, as well as the strong support of relevant policies, the expansion and growth of urban space has become the main task of the most of cities in China northwest now and in the future. In the eastern part of China northwest, Linear City in valley is a necessary choosing of the city form for minimizing the cost of the space expansion under the constraint of natural environment. However, this type of city form brings limitations in functional layout, traffic organization, and space environment, so these serious restrictive problems make the rational of such urban layouts sustain difficultly, and have limited the city development. Based on the research of the large-scale ecological security patterns of the valley cities in the eastern part of China northwest, this research will analyze the performance of the spatial growth form of the urban area, and select an appropriate morphological index system to establish the comprehensive model of urban spatial growth, finally will propose a suitability city form mode of Linear City in valley in the eastern part of China northwest. From the view of the city's natural environment and geographical space, this research will seek a new necessity for the sustainable growth of the valley cities. Therefore, this research has a great theoretical and practical significance to promote the coordinated development of urban economy, society, environment, ecology, spatial form, and to build a resource-saving and environment-friendly living environment, and to shape the characteristics of local cities.