Environmental group events is a new social contradiction in China's economic construction era. In recent years, those events are becoming more and more serious. To provide a theoretical basis for reducing the probability of the incident and rationally resolving incident, studied the main reasons, characteristics and control measures of environmental group events. The main characteristics include relatively complex contradictions, imitative strong, long-time management cycle and occurred in the suburbs and rural areas. The main countermeasure as follow: enhance participating consciousness of resident, enhance environmental monitoring, enhance risk examination, develop environmental risky assurance, and consummating environmental pollution case.