In order to study the migration phenomenon of deterrent in double-base oblate spherical propellant during storage， micro-Roman technique was used to characterize the concentration distribution of dibutyl phthalate（DBP） and poly （neopentyl glycol adipate）（NA） in double-base oblate spherical propellant after accelerated aging； and the combustion performance of double-base oblate spherical propellant was tested by the closed bomb test. Results show that the concentration of DBP and NA changed exponentially from the surface to the inside in one-dimensional direction， which conformed to Fick"s second diffusion law. During the accelerated aging process， the migration of DBP in double-base oblate spherical propellant was bidirectional， the concentration gradient of deterrent decreased gradually， the diffusion depth increased， the peak position of concentration shifted inward， and the combustion performance of double-base oblate spherical propellant also gradually decreased. High temperature would aggravate the migration of deterrent. The progressive combustion characteristic values of double-base oblate spherical propellant samples aged at 65 ℃，75 ℃ and 85 ℃ for 10 days were 1.3351， 1.2917 and 1.1888， respectively. With the increase of temperature， the progressive combustion characteristic values of double-base oblate spherical propellant decreased. Under the same aging conditions， the anti-migration characteristics of NA was higher than that of DBP.