In the modern war, the air force bears the brunt and gives full play to its role, which has extended to the "hero" status of the war. In the future war, especially in the military struggle against Taiwan Province, the air force will play a decisive role. Therefore, strengthening theoretical research is an effective way to further improve the pilot quality of pilots and airmen, ensure flight safety and improve the combat effectiveness of the air force. In order to break the monopoly of foreign countries in the field of satellite navigation, Beidou navigation satellite system came into being, ending the long-term history of relying solely on foreign systems and establishing China's international position in the field of satellite navigation. This paper introduces the present situation of navigation in China, and compares the advantages and disadvantages, present situation and significance of satellite navigation at home and abroad.

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