The invention provides a generating method and system for a stamping die brake bead and a modification type brake bead. The generating method of the stamping die brake bead comprises the following steps: defining a center line of the brake bead, pressing direction, binder surface, height of the brake bead and die stripping corner radius, selecting from a plurality of preset brake bead types, translating the binder surface in the pressing direction to obtain a concave brake bead bottom surface, translating the concave brake bead bottom surface in the reverse direction of the pressing direction to obtain a convex brake bead top surface, stretching the center line of the brake bead, respectively shifting the stretched sheet to outside and inside to obtain two side wall surfaces, conducting circular bead operation to the two side wall surfaces, the convex brake bead top surface and the binder surface to obtain the convex brake bead molded surface, conducting the circular bead operation to the two side wall surfaces, the concave brake bead bottom surface and the binder surface to obtain the concave brake bead molded surface. The generating method disclosed by the invention can automatically finish modeling of the brake bead according to the related parameters inputted by a user, and is favorable to shorten the design cycle and lower the cost.