Liquid phase reduction method is used to alter nano-silver crystal concentration and fabricate near spherical silver powder of different particle diameters.SEM,specific surface area instrument,and laser particle analyzer are used to characterize the physical properties of the silver powder.Besides,low-temperature（200 ℃） sintering activity analysis is carried out.The results show that the silver powder particle is highly crystallized and on a good monodisperse state,and the silver powder particle diameter regularly decreases with increasing added nano-silver crystal concentration;sample 4 has the smallest particle diameter and gradually lost silver powder particle boundary after low-temperature sintering.After 30 min,the silver powder is fully sintered,forming an interconnected spatial grid structure.The fabrication of highly crystallized monodisperse silver powder provides technical support for the development of the HJT battery.