The modified single base propellant was prepared by using an impregnated-deterred technology. The erosion of the propellant to barrel was characterized by erosion tube test. The static combustion performances of the propellant were investigated by closed-bomb test. The dynamic interior ballistic performance of the propellant was studied by 857-30 mm gun. The results show that compared with the conventional single propellant,the barrel erosion of the modified single base propellant decreases by 16.4%,the value of progression factor (P_r) increases from 0.035 to 0.445,and the muzzle velocity increases by 9.8% from 856.6 m·s^-1 to 941.3 m·s^-1,revealing that the modified single propellant prepared in this work has the advantages of high combustion progressivity and low erosion.