In order to study the lap joint performance of the new reserved hook rebar at the vertical seam of the prefabricated shear wall under the influence of earthquake,the ANSYS discrete model was set up based on the research results of monotonous one-time loading. Under the bond-slip constitutive relationship and loading regime,numerical calculations of low cyclic loading under different steel bar diameter and concrete grades were conducted. The results show that compared with monotonous onetime loading,the overlap hook length of reserved hooks under low cyclic load increases by 30%. Under different steel bar diameters and concrete grades,the reliable overlap length of the reserved hooks is close to 0.9labE considering seismic requirements.