Abstract: In recent years, the importance of ecological space has been emphasized in the top-level design of urban land development in China. China is now in the stage of fast urbanization and the pace of industrial structure adjustment, the expansion of the construction land space is the most obvious sign of the transformation of the urban land landscape, and contradiction between cities and towns' competition and control of regional space is becoming more and more prominent. Identifying the urban ecological security pattern and discussing the spatial expansion pattern of construction land have become an urgent need for the implementation of the policy for delineating the red line of ecological protection, determining the boundaries of urban development and the “Three-planning united” spatial control. Using Tangshan City as a case, this paper was based on the theory of “Ecological process—Pattern” and the functions of spatial correlation, distance and superposition analysis of GIS. In this study, we integrated geostatistics analysis, spatial correlation analysis, distance analysis and overlay analysis. It obtained comprehensive ecological security pattern of Tangshan City by 5 single ecological security patterns: comprehensive hydrology security pattern, geological disaster pre-warning security pattern, biological habitat protection security pattern, soil and water conservation security pattern, and recreational security pattern. The integrated ecological security pattern under 3 different levels accounted for 15.31%, 50.08% and 12.70% of the total area respectively. In this paper, we built and improved MCR (minimal cumulative resistance) model, from which the weight coefficient of different levels of “source” was introduced. This paper took full account of the expansion capability of different extended sources. By using comprehensive ecological security pattern, attractiveness of the center of town and the main road and policy adjustment factor as resistance, and then the resistance surface of the regional space under different constraint conditions was obtained to determine the urban development scope under the condition of “Ecological security constraint pattern”, “Economic dominance pattern” and “Ecology & Economy win-win pattern of urban spatial expansion”, respectively. The spatial expansion of urban land was restricted by many factors, not only to consider the regional ecological and environmental factors, but also to pay special attention to the regional social and economic conditions and policy oriented factors. Through multi-scheme comparison, we found that the spatial expansion pattern driven by the conditions of “Ecology & Economy win-win pattern of urban spatial expansion” development model was the best model for the healthy and orderly development of cities and towns in the future, and was of great significance for optimizing the layout of land use and the protection of the ecological environment, moreover, which can effectively predict the scope of urban space development .On the basis of all above, considering the influence factors of urban development, the improved MCR was used to analyze the spatial expansion pattern of urban construction land use under different patterns, and to explore the appropriate ecological security pattern of urban development, which reduced the land conflict between urban development and environmental protection caused by large-scale and high-intensity urbanization and industrialization process, and put forward a scientific basis and reference for urban land layout planning and ecological red line delineation.