Frequent NIMBY conflicts have seriously affected social stability and urban development. This paper aims to explore the psychosocial path of people participating in the collective action of NIMBY conflict, and to provide theoretical basis for effective governance of NIMBY conflict. By integrating the psychosocial explanatory variables related to collective action, we construct a regulated double mediation Model, which is empirically tested with 566 questionnaires from the NIMBY conflict in gaoling, China. The results show that: group relative deprivation, group emotions and group effectiveness have positive effects on people's NIMBY conflict participation tendency; group effectiveness and group emotions are important mediating variables of group relative deprivation affecting people's NIMBY conflict participation tendency; group identity has a positive adjustment effect on people's group emotions, group effectiveness, and the participation tendency of NIMBY conflict. The research indicates that group relative deprivation is the key precursor of NIMBY conflict, group emotion is the key factor driving the deterioration of NIMBY conflict, and group identity is the key factor catalyzing the occurrence of NIMBY conflict. This study helps to explain the psychological mechanism of people's participation in NIMBY conflict, and has certain implications for the prevention and governance of NIMBY conflict.