Abstract: TOPCon solar cells have become the dominant technology of photovoltaic cells because of their high cell efficiency.As the electrode of TOPCon solar cells, silver powder on the front side directly affects the efficiency, so it is the key basic material of the cell.The front side of TOPCon cells requires submicron-sized and monodisperse silver powder with high consistency.Traditionally, monodisperse silver powder has been prepared in two steps: firstly, the silver crystal seed has been prepared, then submicron-sized silver powder has been reduced, but the stability of seed batch production is difficult to guarantee.In this paper, using the template method as a reference, a commercially stable emulsion product is used as crystal seed to replace silver crystal seed produced by a complicated preparation process.At the same time, using emulsion as a template, submicron-sized silver powder is reduced and grown at the interface of emulsion and solution to improve the batch stability of submicron-sized silver powder products and simplify the step-by-step reduction process.In this paper, the feasibility of preparing monodisperse silver powder by using emulsion product as crystal seed and the effect of emulsion product as crystal seed on submicron-sized silver powder were investigated.The results show that the commercial emulsion can be used as crystal seed to prepare highly dispersed and submicron-sized spherical silver powder.As the emulsion product playing a similar role to silver crystal seed, the particle size of silver powder decreasing with the increase of emulsion content shows that the submicron-sized particle size of silver powder can be adjusted by adjusting the emulsion content.