对二维结构有限元网格的生成技术进行了探讨．从直边四边形区域的单元生成到曲边四边形区域的节点坐标映射，再到复杂二维结构的拆分与拼装，提出了一种比较完整的有限元网格自动生成算法，并给出了内燃机活塞网格生成的实例．结果表明，该算法对于内燃机活塞这样的复杂二维结构具有较强的建模能力． The generation technology of two-dimensional finite element mesh is discussed. This paper presents a more complete finite element mesh generation algorithm from the unit generated in the straight quadrilateral region to the node coordinate mapping of the quadrilateral region in the curved quadrangle to the disassembly and assembly of the complex two-dimensional structure. The internal combustion engine Example of piston grid generation. The results show that the proposed algorithm possesses strong modeling ability for complicated two-dimensional structure of internal combustion engine piston.