Abstract: Under the background of ecological civilization construction, delimiting the boundary of construction land scientifically is the key to enhance the quality of urbanization, coordinate the relationship between people and land, and improve the urban ecological environment. This paper takes the built-up areas and ecological protection lands as two types of expansion sources based on the MCR model, constructing four resistance factor systems of nature, location, environment and policy, applying AHP to calculate the resistance coefficient of each factor, then dividing the appropriate partition of construction land according to the minimum resistance difference which obtained by the two types land expansion, and using Hydrology expansion module to determine the appropriate expansion path and isolation zone for construction land. The results showed that: (1) The closer to the extended source, the smaller the resistance valueis. The difference between the resistance values is large due to the inconsistent spatial distribution of the construction land and ecological land source. （2) The suitability of construction land for the resistance difference of the two types land expansion based on MCR model can be divided into key construction area (65 771.64 km²), optimization construction area (51 103.28 km²), restricted construction area (21 001.54 km²), and prohibited construction area (17 150.01 km²) and ecological restoration area (11 894.70 km²), different suitability divisions have different requirements for land development and construction respectively. (3) The “valley line” obtained by the Hydrology guides the optimization of development of construction land, avoids the blind “spreading pie” type of spread pattern, and the “ridge line” obtained by the Hydrology controls the expansion of the construction land, breaking the concentration of contiguous areas of suitability. The results can provide suggestions for the scientific planning and rational layout of construction land, and promote the coordinated development of urban development and environmental protection.