The silvercopper nanoparticles were prepared by using the starch in rice as the stabilizer and the sodium hydroxide as the reducing agent. The surface morphology of silvercopper nanoparticles was observed by SEM at high magnification and the structure of the silvercopper nanoparticles was qualitatively analyzed by the transmission electron microscopy.The elemental composition and the relative content of each element were determined by Xray photoelectron spectroscopy. The solar cell sintering process was quantitatively determined by thermogravimetric analysis (TGA).The photoelectric performance measurements of the polycrystalline silicon cells with and without addition of 10% AgCu nanoparticles to the positive electrode paste were performed respectively by using the solar simulator. The results showed that the addition of 10% nanoAgCu to the positive electrode paste resulted in the increase of the AgCu content,and the cell parameters were improved, among which the most important photoelectric conversion efficiency was increased by 5.65%.This verified that the use of cheaper Cu nanoparticles to replace part of the Ag nanoparticles was able to slightly improve the efficiency of the photoelectric conversion of the battery.