The data of China Migrants Dynamic Survey and special investigation for the elderly in 2015 are adopted to create the logistic regression model to illustrate the demographic characteristics，health status and influential factors of using public health services of elderly floating population，this paper finds that the floating elderly coming from various parts of China and inflow eastern China for caring reasons. The self-reported health status of floating elderly is well and the prevalence of chronic disease is 25.4%. The habits of healing both daily sick and serious illness did not developed in the place the elderly moved in while they had great passion on daily exercises as compensation. The elderly floating population makes 8.8 new friends in average and 23.8% of them rely on family economic supports and 80% apply for Variety of types of basic health insurance. Meanwhile，age，self-reported health status，floating motive，types of urban and rural residents and main economic source are important factors for the old people to use community public health services while the gender and educational are not. Therefore，this paper put forward following suggestions：Firstly，inflow areas should strengthen the leading function of community public health services organizations. Secondly，inflow areas should enhance the preventive function of basic medical institutions to help the elderly getting medical information. Finally，the negative mentality for treatment should be decreased and the family and community should give more healthy support for the elderly floating population.