Abstract: With the development trend of the underground space in the central area of Beijing’s inner city, based on the conventional construction technology of excavation engineering, the analytic hierarchy process is adopted to establish a new suitability evaluation method for engineering geology. The calculated results of this method can be used to estimate the influence of engineering geology condition on the construction and usage of excavation engineering. The proposed method can be used to estubish a technological platform of engineering geology suitability evaluation for the development planning of urban underground space in Beijing. It may provide reference for suitability evaluation work of similar engineering geology.