Abstract: Suzhou, as the second biggest city of immigrant city, has a relatively big population of disadvantaged groups. By means of literature survey, questionnaires, mathematical statistics, logic analysis and field survey, centering on the social support for physical fitness of the disadvantaged groups in Suzhou, an investigation is made in terms of the state policy, legislation, rules, popularity campaign, sports facilities, sports security, and the social relationship network of an individual. And some countermeasures are thus put forth: efforts should be made to step up macro-guidance and micro-reification; to create more paths for the disadvantaged groups to participate in physical fitness; the establishment of a sports foundation for physical fitness welfare; to increase more pointed sports facilities so as to improve the results of use; to help build and perfect a support network for the disadvantaged individuals.