面对我国森林质量不高的现状,提高木材出材率已逐渐成为缓解木材供需矛盾的根本途径.本文提出弯曲原木的数学模型,全面地描述出弯曲原木的解析形状,并借助计算机辅助设计实现原木的三维再现,对于提高原木出材率和利用率、提高木材加工技术水平与现代化程度有着极为重要的影响和广泛的应用前景. Faced with the current situation of China’s forest quality is not high, increasing the timber out of the timber rate has gradually become the fundamental way to ease the contradiction between supply and demand of wood.This paper presents a mathematical model of curved logs, a comprehensive description of the analytical shape of curved logs, and with the help of computer-aided design The three-dimensional reproduction of logs has a very important influence and broad application prospects for improving the timber output rate and utilization, improving the wood processing technology level and modernization.