The telecommunication/IT industry were rapid growing in the recent years, and the telecommunication manufacturer promoted the foundation equipment application unceasingly. In such the developing nations like China and India, the network foundation equipment demand grows gradually, in which China was already the quickest growing nation in telecommunication markets of the whole world, the growth rate will continuously maintain about 14% every year in the future. The Switching Power Supply (hereafter refers to as SPS) is rapidly growing in the country, in which the SPS has high profit potential product. By successful developing experience, integrity, vertical & horizontal conformity industrial structure, high quality, short delivery, smaller size, higher output, lower cost, better radiation, which create the industry competitive advantages. The purpose of research is to understand the industry development tendency of SPS, and will discuss how the value chain of SPS to survive under the global finance pressure, and even face with the re-shuffle effect. In this research take D Corporation as the example, discusses under the marketing demand drop pressure , how to develop the competitive business model and key successful factors to cope with. Then, using tool like SWOT, five forces analyses, discovers the way for D corporation to go forward to right direction. Finally, the concrete suggestion will be proposed, and to provide with the conclusion to D Corporation and related Department or organization as compete strategy in the future.