With the flourishing and wide application of laptops, it has become overarching to improve product quality and manufacturing efficiency and key technique and product quality control in the process of laptop production have attracted the most concentration. Based on the analysis on key technique in terms of PCB design, miniature components assembly technique, production line design and PCB cleaning, this article studies how to increase the efficiency of automatic machine assembly and yield rate of products. Through the adjustment of product design and key technique and effective quality control, automatic equipment is capable of meeting the requirement of laptop assembly features in order to provide effective quality insurance to the application of automatic devices in laptop industry.