The purpose of college students' national defense education is to better improve their enthusiasm for learning military knowledge and participating in military training, better popularize military theories and skills, strengthen their national defense awareness and enhance their comprehensive quality. Cultivate the will of college students to bear hardships and stand hard work. Enhance the patriotism of college students and strengthen national defense education. Military theory teaching and military training in colleges and universities can not only help college students master basic military knowledge and skills, but also enhance their national defense concept and national security awareness, strengthen patriotism and collectivism, enhance organization and discipline, and cultivate a hard-working style. Through in-depth and lasting national defense education for college students, strong spiritual strength can be generated in their hearts. How can we devote ourselves to and participate in national defense construction? First of all, we should start with military training. We should also seriously study military theory and establish a sense of national defense legal system. The most direct way is to join the army in response to the call for conscription. You can become an excellent military talent by entering various military academies, thus strengthening the national defense construction of the motherland. You can also join the grassroots militia and become a qualified reserve. As long as the war breaks out, the national defense needs of the motherland can immediately set out to defend the motherland.