In new era, the urbanization and industrialization in different places develop rapidly, especially Chongqing, as national overall urban and rural comprehensive coordinated reform zone, accelerates urbanization progress and makes the peasants in different areas enter into the cities to live and work, however, the different resources endowments, economic basis and social conditions of different cities result in the differences in the adsorption of rural migrant workers to live and work in the cities. This paper designs evaluation indicator system, uses mean square deviation decision method of multiple indicators comprehensive evaluation to make qualitative description on the capacity of the adsorption of rural migrant workers by the representative cities of China’s seven regions, obtains the Chongqing’s capacity level for absorbing the rural migrant workers in China and gives ideas and suggestions for improving the absorbing capacity of the rural migrant workers.