In order to investigate the combustion stability of flake variable burning rate propellant under high and low temperature cycle preservation， based on the morphology of samples and the change of combustion performance， a 20 time thermal cycling treatment was carried out， in which samples were separately stored at 70 ℃ and -50 ℃ for 10 h as one cycle. The surface and section morphology of propellant was observed via optical microscope， and the combustion performance at 50 ℃， 20 ℃， -40 ℃ was tested by closed bomb. Microscopic observation shows that after thermal cycling treatment， the bubbles on the surface increase and the section of propellant becomes lumpy and uneven due to plastic deformation， while the interface between the inner and outer layers remains tight without visible cracks. The combustion performance basically unchanged after thermal cycling treatment， and the dynamic activity curves nearly overlap， for which the maximum ΔL_a is 2.57% at low temperature. After thermal cycling treatment， the temperature coefficient under high-pressure from normal to low temperature is significantly lower than that of the original under the same conditions， and the difference in pressure index of the flake variable burning rate propellant at high temperature and low temperature is smaller than that of the original under the same conditions. Attributed to bound interface and combustion consistency， flake variable burning rate propellant has good storage stability under different temperatures.