Abstract: In order to provide policy basis for sustainable development of cities in central China, an empirical study on citizenization level of peasant workers in Taiyuan City was conducted. Characteristics of peasant workers were investigated and the citizenization level was evaluated based on the evaluation index system. The evaluation index system of urbanization standard which contained living conditions, economic conditions, social public service, social inclusion, political participation and psychological adaptation was established, and weights of indexes in all dimensions were determined using questionnaire method, entropy evaluation method and subjective opinion method. The results showed that the overall level of citizenization of peasant workers in Taiyuan was high. But it was still in the initial stage as the material citizenization process was far superior to that of spirit, meaning that peasant workers had not finished the transformation from the migrant worker to citizen. Particularly, the level of social public service for peasant workers was low. Therefore, in order to promote citizenization effectively and efficiently, it is necessary for the government to strengthen its effort to increase the financial supports in education, medical care and housing security to peasant workers.