Abstract: To address current absence of theoretical calculation basis for structural parameters of flat transposed conductors, product structure of flat transposed conductors was analyzed. A combination of 3D physical simulation and mathematical derivation was employed to study the quantitative relationships between various structural elements. Consequently, a parametric model design scheme suitable for the structural calculation of flat transposed conductors was extracted. Furthermore, application examples were utilized to compare the differences between calculation results of parametric model and actual measurement results. Results demonstrated close agreement between theoretical computations from the parametric model and empirical measurements of flat transposed strand, a semi-finished state during the combined stranding and transposition process. The utilization of parametric model in the design of jigs not only fulfilled process specifications for the stranding and transposition of flat transposed conductor, but also addressed the manufacturing technical challenge associated with morphological transition from film-coated metal monofilament to flat transposed strand configuration. The parametric model of flat transposed conductor structure was developed to provide a viable solution for process research, tooling design and process development, which could hold significant practical value for electromagnetic wire design and manufacturing industry. It was anticipated that the application of the model would provide strong support for technological development and innovation in related industries.