Abstract: The offset of finite element mesh has three basic conditions：continuous mesh, consistent normal and offset rationality. A fast and effective normal consistent algorithm, seed element method, is presented. The judge methods of offset rationality is deduced at element local coordinate, and ensure that the element plane distance between after offset and before is close to the offset distance. The validity is conformed by the simulation results of the complex industry-forming product.

Key words: Automobile panel forming surface, Finite element mesh, Offset algorithm, Seed element method