Based on the mature formulation of magnalium fuel-rich propellant,the burning rate of the magnalium fuel-rich propellant with good uniformity and stability has prepared.The effects of various factors for burning rate uncertainty on magnalium fuel-rich propellant are analyzed.The results show that the burning rate of magnalium fuel-rich propellant which we prepared has good uniformity and stability,its extended uncertainty is less than 2.0.