在ＶＬＳＩ标准单元通道布线问题中，布线面积大小和过孔多少是衡量布线结果优劣的重要指标．文中从一个全新的角度提出了“线网投影长度”的概念，运用这一概念对通道内的线网设置优先级，按照优先级依次布线，就可实现不仅减小布线面积，同时又减少过孔数的目的，而且为进一步的过孔优化留有余地． In the VLSI standard cell channel routing issues, the size of the wiring area and the number of vias is an important indicator of the pros and cons of the wiring results. In this paper, we propose the concept of “wire mesh projection length” from a new perspective. By using this concept, priority is given to the wire mesh in the channel, and the wiring in order of priority can not only reduce the wiring area but also reduce The purpose of the number of holes, but also for the further optimization of vias.