In 1949，the People’s Republic of China was founded. Now，70 years later，China has leapt from a country that had accumulated poverty and weakness to the world’s second-largest economy. This is inseparable from the stability and development of China’s border areas. By reviewing the frontier strategy and practice in the past 70 years，it is found that in the practice of revolution and socialist construction，the generations of collective leadership have kept pace with the times and constantly adjusted the frontier strategy to adapt to the current practice. Whether it is the peaceful settlement of border issues，the adherence to and improvement of the system of regional ethnic autonomy，or proposal of the “Rule of the country must rule the border，rule the border first stable Tibet”，“promote social stability and long-term stability in Xinjiang”，“build a strong maritime power” and other strategies，all shine the light of the new era.