Abstract: With the amount of DEA as the knob to control the nucleation-growth rate of silver particles the high performance submicron spherical silver powder was prepared using hydroquinone and ascorbic acid to reduce silver nitrate by liquid chemical reduction method. The effect of DEA content on the properties of silver powder was studied. When the DEA content is 50% of the mass of silver nitrate, submicron spherical silver powder with average particle size D₅₀ of 0.49 μm, specific surface area of 2.3 m²/g, apparent density of 1.7 g/cm³ and burning loss of 0.35% could be obtained. By X-ray diffraction (XRD) and SEM analysis, silver powder has high purity, good crystallinity and high dispersion. After the silver powder is prepared into silver paste according to the formula, the measured viscosity is 38 Pa·S/25 ℃, after screen printing and low temperature curing. It is found that the lines are relatively dense and the edge lines are flat. The resistivity of the film cured at 200 ℃ is 8.70×10^-6 Ω·m.