Abstract: Satellite navigation plays an increasingly important role in the field of national defense and national economy,and people have been gradually familiar and relied on its positioning, navigation and timing service. Satellite navigation and positioning system has covered the basic requirements of positioning in outdoor areas. In outdoor open areas, the Beidou system has been able to provide relatively reliable positioning performance, but the satellite signals cannot cover indoor areas, so it is difficult to meet the necessary positioning conditions. 5G system has several favorable conditions for positioning e. g. , dense network, large bandwidth and multiple antennas, etc. Through the integration of Beidou and 5G, a seamless indoor and outdoor positioning system can be built to meet the growing demand for ubiquitous positioning. This paper analyzes the development of Beidou and 5G integration positioning systen, introduces several typical integration positioning technologies, and finally verifies the performance of the integration positioning technology through simulation

Key words: satellite navigation, Beidou, 5G