Under the background of economic globalization，enhancing the international competitiveness has become the core of industry development . Textile clothing is one of the predominant traditional industries in China，while it has endured more fierce pressure in recent years . Based on Professor Porter 's Diamond Model theory，this paper analyzes the present conditions and problems from four aspects : factor endowment，domestic demand，relevant industries and enterprises ' strategy，structures and competitiveness . Meanwhile， it compares the competitive capability of China，India，Italy and other countries by calculating the Revealed Comparative Advantage(RCA)Index. In the end，four countermeasures and suggestions for the competitiveness promotion of China ' s industry of textile clothing are accordingly proposed .