A lot of researches on the cost of migrant workers’ citizenization calculate its housing cost but their calculating results have obvious difference, its main cause not only lies in the coexistence of high estimation and low estimation but also originates from multiple recognition disagreements on calculating ideas. According to the disagreements in present researches, this paper constructs a more brief calculation framework, based on the idea that “a migrant worker should have a place to live”, uses the housing cost gap between a migrant worker and an urban resident to measure the cost for migrant workers’ citizenization at one time, and uses the survey data in CGSS2015, CHFS2015 and CLDS2016 to conduct calculation. The results show that at present, the one time cost for realizing a migrant worker’s citizenization is about 28 thousand yuan, annual residing cost is about 1633 yuan per person, and the proportion between average per person and average family residing cost to their wage is about 0.71-1.26 and 1.14-2.02 respectively. In the regions whose economic development situation is better, their housing cost for migrant workers’ citizenization and their cost wage proportion are higher, it is highest in east area, followed by middle area and west area, it is lowest in northeast area. Therefore, China should make policies based on the situations in different places and different cities to effectively boost the housing citizenization for the migrant workers in different places by different housing policies.