Abstract: The ring with inner gridding stiffeners has been widely used in the aerospace field because of its high strength and light weight. A continuous local constrained rolling processing was proposed to solve the problem that the part is difficult to be formed due to its complicated structure（inner gridding stiffeners on the thin wall of the ring）. The forming principle of constrained rolling for ring with inner gridding stiffeners was sketched, then finite element model for constrained rolling was established by using Deform-3D finite element simulation software and the forming process was analyzed, the macroscopic deformation law including inner gridding stiffeners filling, effective stress distribution, metal flow and forming force were obtained. The results show that during constrained rolling for ring with inner gridding stiffeners, the deformation law of each inner gridding unit is consistent, and there exists neutral face, active deformation area and passive deformation area in the deformation zone, and they change periodically under each rolling pass, the filling of every inner gridding units is uniform,also the forming force increases in a periodic wave with time.