The shape function of the layered propellant was established to study progressive combustion property. The four main factors,including the ratio of the thickness of the slow layer to initial thickness,the burning rate ratio of the fast layer to slow layer,the ratio of the thickness of propellant to the length of propellant,the content of DRX,posed effects on the progressive combustion property of the layered propellant. Using the parameters,they were calculated and analyzed according to the geometrical model and the shape function of propellant. The variation curves of combustion quality percentage,relative surface area with burned thickness percentage were obtained. Results show that the progressive combustion property of layered tubular propellant is better than that of layered sheet propellant.