Abstract: Night-time light data from 1997 to 2012 and two points method based on statistical data were used to extract the build-up areas of the city Wuhan. Indexes including the urban land expansion, the construction land growth type, the speed of urban land expansion, the urban expansion direction and the compactness of the city boundary were used to analysis the rules of construction land expansion of Wuhan. Research shows that: the overall expansion rate of construction land is 152.2%; the expansion experiences the speed of "slow-fast-slow"; the distribution of the city center moves to the Southeast; the compactness of the built-up area decreases first and then increases. There is a strong positive correlation between the development level, the agricultural population and the city spatial expansion.