The combustion characteristics of silver-wire embeded fuel-rich propellant grain are investigated. The effect of the diameters of silver wires and the composition of the propellant on the combustion properties is studied. The test pressure-time curves show that the combustion process of silver-embedded fuel-rich grain consiss of initial part, steady part and end part. The silver-embedded fuel-rich propellant grain with coarse silver wire（diameter: 0.3mm and 0.4mm）gives up high burning rate. Furthermore, to increase the burning rate of the fuel-rich propellant is also a good way to increase the burning rate of the silver-embedded fuel-rich propellant grain.