The elderly immigrants in poverty alleviation and relocation are limited by their age, health, education, income and even language communication skills. Their social integration in relocated settlements faces more difficulties and challenges than other kinds of immigrants. From the perspective of social integration, this study conducts questionnaire surveys and in-depth interviews in 13 ethnic minority areas of Guizhou Province to understand the actual performance of the elderly immigrants in their social integration, analyzes the current difficulties they meet and the influencing factors that affect their social integration, and puts forward specific paths for the elderly immigrants to conduct social integration. From a macro perspective, the effective policy support is the guarantee for the elderly immigrants to achieve social integration. From the middle level, social coordination is the necessary condition for the elderly immigrants to achieve social integration. From a micro perspective, self integration is the inevitable choice for the elderly immigrants to achieve social integration.