In order to obtain good ignition performance of the nitramine propellant,certain amount of potassium picrate with strong ignition ability was added.Three compositions with different formulations were designed,and their ignition performances were tested. The results show that the ignition delayed time of them were 1.79, 2.11 and 3.05 ms respectively. The potassium picrate in the formula can help to reduce the ignition delayed time and pressure rise time. Some characteristic parameters of actuated ability of three compositions were theoretically calculated according to the least free energy law and again verified by closed burner tests. It is obtained that different compositions have almost the same values of powder force and pressure impulse with 544 kJ·kg^-1 and 4 kPa·s respectively if the content of nitramine in each composition is maintained to be 10%.