Abstract: The generation of dolomite reservoir mainly depends on diagenetic deformation,among which dissolution is the most important.Dolomite reservoirs in the Changxing and Feixianguan Formations of the northeastern Sichuan Basin were studied.The relationship between dissolution pores and structural features such as cracks or micro-cracks in reservoirs were analyzed.The experiment of dolomite dissolution in stress state was carried out and the influences of cracks or micro-cracks on dolomite dissolution were discussed.It was concluded that the development of cracks was favorable for dissolution,and the burial dissolution under structural deformation was the most important deformation effect for dolomite reservoir.