In order to improve the comprehensive performance of nitramine double-base propellant, carried out application of pentaerythrite diazidodinitrate (PDADN) in screw extruded nitramine modified double-base propellant was studied. The mechanical property, burning characteristics, chemical stability, mechanical sensitivity, energy characteristics and gas characteristic signal of propellants were measured. Results show that use of the new-type energetic material not only improves mechanical property of propellants, but also is beneficial for increasing propellant energy and decreasing characteristic signal of burning gas and burning temperature.