CO2 geological storage projects belong to environmental protection projects, and geological safety is the primary factor for CO2 sequestration for a long time. According to an analysis of CO2 geological storage safety influencing factors, the authors built geological safety evaluation indexes system on the basis of the AHP structure and tentatively calculated the weights. It is held that CO2 geological storage safety could be evaluated comprehensively by fuzzy synthetic evaluation method. In addition, the geological safety evaluation method of CO2 geological storage and the means for safe project site selection in