The Central Asian countries, as the major region of "New Silk Road " presents unpredictability and uncertainty in terms of security threats. National interests are beyond the limits of their national territory. With the “New Silk Road” being further promoted, Central Asia is becoming the essence of China's security border. National interests in foreign countries are relative to its citizens’ security; domestic security and overseas security form a common destiny. Therefore, to protect overseas interests is as important as domestic ones.