Abstract: Given that participation in mass events can be used to measure social stability， the World Bank data and CGSS (2010) data were taken to investigate the effect of the degree of property rights protection on social stability. The results showed that the higher the degree of regional property rights protection is， the less likely people in the region participate in mass events. By the grouped regression， it was found that an increase in the degree of property rights can reduce the possibility that individuals who perceive rights violation participate in mass events， but it has no significant effect on the individuals failing to perceive rights violation to participate in mass events; an increase in the degree of property rights protection has no significant effect on the high income group to participate in mass events， but can reduce the likelihood that the low income group participates in mass events; and the degree of regional property rights protection has no significant effect on the urban residents to participate in mass events， but can reduce the possibility that the rural residents participate in mass events.

Key words: degree of property rights protection, social stability, mass event, perception of rights violation