The target of national defense education is all citizens, and the key targets are leading cadres, teenagers, militia and reserve personnel at all levels. National defense education is a social activity to defend national sovereignty, territorial integrity and security, resist foreign aggression, subversion and threats, and impart ideas, knowledge and skills related to national defense to the whole people. National defense education is a basic education for all citizens, involving all aspects, rich in content and wide in scope. The integrity of national defense construction determines the content of national defense education. Modern national defense not only refers to army building, weapons and equipment building, battlefield and strategic location building, but also relates to the country's economic strength, political situation, national psychology, education level and population quality.