分析了点到空间曲线的几何特征，根据这些几何特征，提出了点到空间参数曲线最小距离的简化算法。基于三次B样条曲线编制了计算机程序，通过大量算例验证了算法的有效性，其计算精度高，迭代速度快，程序执行效率高，在工程上具有一定的实用价值。“,”This paper analyzes the geometric characteristics between a point and a spatial parametric cure, based on which a simplified algorithm of the minimum distance between a point and a spatial parametric cure is developed. Based on the cubic spline curve, the programs is designed. The effectiveness, high precision, quick iteration and high efifciency of the algorithms are veriifed by a series of tests. It has more practical value in engineering practice.