A energy-increased desensitized propellant was obtained by dipping of nitroglycerine and addition of fire-retardant polyester materials into 11/7 single-base propellant. The tests were carried out in an ignition apparatus and a closed bomb. The results of ignition test show that ignition delay time of the energy-increased propellant decreases from 5.8 ms to 4.1 ms, while that of the energy-increased desensitized propellant increases from 5.8 ms to 45.5 ms. The results of the closed bomb show that combustion time of the original single-base propellant is 9.5 ms,the energy-increased propellant is 8.5 ms,and the energy-increased desensitized propellant is 10.86 ms,respectively. The energy-increased desensitized propellant has very progressive combustion properties.