By using the improved consecutive Hamming method, the site types in the Chengguan district of Lanzhou City and Zhangye area have been classified. The results show that it is feasible to classify site type using the method of pattern recognition. It not only improves the past empirical and macroscopic methods, but also makes it numeralization and computerization. The present method also increases the accuracy and velocity of recognition while improving the recognition ability. It is possible to comprehensively analyze, and pick up the various factors such as geology, topography, geomorphology, site soil features, etc, and to identify the site types quantitatively.