Abstract: This research takes urban construction land of 87 urban areas in eastern China as objectives, and aims at analyzing rules of urban construction land changes and the influential factors. At the same time, appraisal indicator style was designed to appraise the using benefits of construction land and the using benefits were then classified and discriminated. In the process of researching, some statistical methods were adopted, such as cluster analysis that classified urban construction land using benefits into 5 kinds: Bayesian discrimination analysis that obtained 5 discrimination relations. Besides, ArcGIS 9.0 was used to display the dynamic degree and some influencing factors. The results are shown as follows. (1) Total areas of urban construction land increase largely, and the increasing speed is fast. (2) The trend of increasing speed drops slowly, and takes on differences in different stages. (3) Differences are obvious among provinces and economic development circles. (4) The biggest correlation coefficients are shown between urban construction land area, gross domestic production and fixed asset investment, both being 0.90. The increase of economic investment and the growth of population are the important driving forces to the changes of urban construction land. (5) Using benefits of urban construction land are divided into 5 kinds, and the number of the third kind is the most, which is 488 and up to 62.32%. And it is the second production per urban construction land area that is the most important factor to the cluster result. (6) discrimination relations are determined and the accuracy can meet the requirement.

Key words: classification, discrimination, eastern China, urban construction land, using benefit