Taiwan¡¦s PCB industry has established a complete industry cluster in Taoyuan, we are famous for the flexible delivery, outstanding quality and competitive price, it leads Taiwan to become the third largest PCB production country in the world. Nevertheless, even PCB industry has essential position in worldwide IT industry, high market concentration ratio, high product homogeneity and powerful bargaining power of buyers have weaken the profitability and forced many leading companies exited the market, such as Shea May, Unicap, Printed Wire 2003 and Unic in 2004, however, under such competitive environment, there are few companies steadily grow up and holding high performance in this battlefield. The purpose of this study is to present the competitive strategies of three high performance PCB companies ¡VGlobal Brands Manufacturer Ltd(CMK-GBM), Dynamic Electronics Co. Ltd.(Dynamic) and Taiwan PCB Techvest Co. Ltd.(TPT) along with associated literature documentations, also, through the case study and on-site interviews, we may have better understanding of the core competencies and competitive edge inside these high performance companies. The result of this study presents that different competitive strategies have been selected by CMK-GBM, Dynamic and TPT but all of them emphasize on marketing ability and production efficiency these two core competencies. Furthermore, their competitive advantages are driven from their competitive strategies and core competencies. Based on the study, isolated one-man business managing style is outdated. Instead, for the purpose of achieving the maximum synergy, enterprises must plan and choose punctiliously with their cooperating vendors or integrate with other companies of similar business conduction. For instance, CMK-GBM chooses to cooperate with the world¡¦s biggest PCB company Japan CMK in order to shorten the time and effort in the fields of technology and customer development. Dynamic applies the tactics of vertical integration to crisscross the investment to the raw materials vendor so they are able to acquire the raw materials steadily and competitively. TPT selects the strategy of horizontal integration and cooperation with single production process PCB vendors so they are able to provide a prompt delivery data and a competitive pricing. Furthermore, helping them to position as the 2nd biggest PCB supplier of TFT-LCD PCB market. In viewing of this comprehensive study, besides the excellent choices of the suitable strategically alliances, all these three PCB companies also have outstanding and loyal manpower resource, high quality product, and superior production capability. Therefore, they are able to break through difficult dilemmas and to grow continuously in such an intensively competitive industry.