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In recent years, many cities in China have vigorously promoted the subway construction, which has eased the city’s traffic pressure and promoted the development of the regional economy. However, after constructing subway in some cities, the intensity of passenger flow has not reached the expected level. The inefficiency of subway operations makes local governments pay more for subway project subsidies. Therefore, on the basis of the distance attenuation theory of passenger flow, this paper used a web crawler to obtain the data of the surrounding houses of the subway line, constructed the subway passenger flow attractiveness (SPFA) model, and reasonably evaluated the passenger flow attractiveness of the subway line. Then, the model was used to compare and evaluate the SPFA of Tianjin, Beijing, and Shanghai and analyze the reasons for the low passenger flow intensity of the Tianjin subway. The results …