针对快速原型制造系统中广泛采用的立体光造型 (STL)标准本身的近似性给切片后所带来的固有误差 ,通过分析、比较常用的几种离散点序列拟合方法 ,结合快速成型系统的特殊性 ,提出了一种切实可行的拟合方案及其实现原理 ,并已成功地应用于系统中 The approximation to STL standard widely used in rapid prototyping system gives the inherent error after slicing. By analyzing and comparing several commonly used discrete point sequence fitting methods, combined with the rapid prototyping system Particularity, proposed a feasible fitting scheme and its realization principle, and has successfully applied in the system