In order to improve the efficiency of roll flower design and solve the problems of cumbersome  design and difficult to modify for traditional roll flower, according to the principle of constant neutral layer length for the section during the bending process of sheet, a node coordinate mapping model describing the shape change of the formed section was established, and by analyzing the changing rules of arc node coordinates for the bent section of sheet in roll forming, taking an arc and a straight line as the smallest voxel unit for the sheet metal bending, the function relationship between the geometric parameters of target section and the node coordinates on the section was obtained, and a node coordinate calculation formula describing the shape change of the symmetric section when the sheet was bent by the fixed radius method and the fixed length method was deduced. Furthermore, for the eight-bent angle symmetric section, according to the derived node coordinate calculation formula, the identification of section characteristics was converted into the input of section parameters, and combined with the parametric design idea, a python script program based on the secondary development of ABAQUS was written to realize the drawing of various symmetrical section roller pattern, and the rationality of the designed roll flower and the feasibility of the design method were verified by dimensional comparison.