After reviewing related theories on stigmatisation of people living with HIV/AIDS (PLWHA), this book applies social exclusion theory, actor theory and stigma theory to the study of social mechanisms of stigmatisation of PLWHA in China to show the influence and mechanism of stigmatisation on them, and tries to construct the policy framework to tackle stigmatisation from the perspective of welfare pluralism. Qualitative analysis was used and data was obtained during the field interview. Thirty PLWHA and seventeen healthy people (non-infected people and staff of ASO Service Organizations) were selected by using random sampling and snowball sampling for semi-structured depth interviews. The research examines the treatments and living conditions of those PLWHA, aiming to explore the influence of HIV on them in education, employment, medical care, economy, welfare and social relations. The book is intended for graduate students, researchers interested in this field and relevant policymakers.