Waterborne polyurethane (WPU)/silica nanocomposite dispersions were prepared through the prepolymer mixing process.Then different amounts of aqueous AgNO3 solution were added to the WPU/silica dispersions to obtain WPU/silica/AgNO3 nanocomposite dispersions.The dispersions can undergo self-crosslinking through the condensation reaction of silica during the drying process.The incorporation of AgNO3 provides antibacterial property to the dispersions.