In this paper, research of aftershock mechanism is reviewed, including heterogeneity of medium and stress, mechanical loading, fluid intrusion and stress corrosion, rate-state dependence. Previous studies have indicated that the heterogeneity of media and stress is the basic premise of aftershocks generated. From the point view of mechanics, transient creep and afterslip can explain the decay of aftershocks in a short time after a main shock and the relaxation of stress tend to interpret the characteristics of long-term aftershocks. Fluid intrusion and stress corrosion control the evolution process of the aftershocks under certain conditions. The interaction between the faults disturbed by the main shock always exists during the aftershock activities. All kinds of models and the theories want to comply with the two basis power-law relationship the G-R relationship and Omori formula to some extent.[著者文摘]