Abstract: Based on the survey data of rural migrant workers from 5 cities in Shaanxi Province, including Xi’an, Xianyang, Weinan, Baoji and Hanzhong city, and applying the Analytic Hierarchy Process (AHP), this paper evaluated the differences and influencing factors about the urbanization degree of rural migrant workers in 5 cities by a comprehensive index system of six individual indicators, including living conditions, economic status, professional development, social network, basic rights, and psychological awareness. Results show that there were large regional differences for both the comprehensive index and the individual indicators of the urbanization degrees of rural migrant workers among 5 cities, Shaanxi Province. The highest comprehensive urbanization degree of rural migrant workers was 48.09% in Hanzhong city and but the lowest was 40.59% in Xi’an city. For individual indicators, the maximum difference was found in the basic rights and minimum difference was found in living conditions. Results also show that the influence factors include age, cultural level, personal income level, and regional income level. But different factors played different roles on each individual indicator. In order to improve the urbanization degree of rural migrant workers, comprehensive policy measures should be created according to local conditions in different cities.