Abstract:ICT industry characteristic of high intensity of technology and patent is a strategic emerging industry to which has been paid great attention in China. Patent layout strategy, patent lawsuit and invalidation strategy are main ways by which companies participate in competitions. How to make full use of patent invalidation information and make a thorough analysis of competitive situation of ICT industry are of key significance to cooperation to improve their competitive strategy efficiency. Based on invention patent invalidation data for ICT industry in China, SNA (Social Network Analysis) method is used to build a patent invalidation relation network. This paper divides all enterprises into four types using social network centrality analysis. Analyzing and comparing their competition positions and characteristics, this paper raises several suggestions to the all types of enterprises. It is found that differentiation, contingency and discretization are typical feature of ICT patent invalidation network. Accordingly, for different enterprise, competitive strategies are analyzed.