Abstract: With the advancement of technology and the emergence of new needs, the bottleneck of real-time high-precision positioning of GNSS system at the institutional level is becoming increasingly apparent, and the current high-precision enhancement technology based on GNSS still cannot break through the limitations of the system itself, and the convergence time of 1min and the positioning accuracy of 10m have reached the upper limit. With the rise of large-scale LEO satellite constellations in recent years, the Ka-band for LEO communication has shown great potential in the field of navigation. In this paper, aiming at the technical status of Ka-band low-orbit navigation system, the potential performance advantages of Ka-band in the field of low-orbit navigation such as antenna gain, code tracking accuracy, ionospheric error are analyzed through simulation. Secondly, the influencing factors of Ka-band positioning accuracy are analyzed and calculated, and the conclusion of the three-digit positioning accuracy of Ka-band navigation signal users is 0.0475 m. Navigation enhancement based on Ka-band signals is expected to break through the bottleneck of the current GNSS system and achieve real-time high-precision positioning with convergence time of seconds and positioning accuracy of centimeters, which is the development trend of navigation system in the future and provides reference for the development of low-orbit navigation augmentation system in China in the future.